Goldstone Radar Observations Planning: (65803) Didymos & Dimorphos


Background


(65803) Didymos
(65803) Didymos was discovered on April 11, 1996 by Spacewatch at Kitt Peak.
Didymos is a binary system with a primary diameter of 0.78 km and a secondary diameter 
of 0.15 km (Naidu et al. 2020).
The primary name is Didymos and the secondary name is Dimorphos.

Didymos is the target of NASA's Double Asteroid Redirection Test (DART) mission (2022), the Italian Space Agency's
LICIA cubesat mission (2022), and the European Space Agency's Hera mission (2026). 

The DART spacecraft will impact Dimorphos on Sep. 27, 2022.  The impact is expected to shorten 
the orbital period by at least 1%.  Observations are scheduled at many telescopes around the world.

For more information about the DART mission, please go to:
https://www.nasa.gov/planetarydefense/dart 
and
https://dart.jhuapl.edu

Time at Goldstone has been requested from late September to the third week of October, 2022,
dates that begin two days before the DART impact and extend to about 3 weeks after it.  

The Goldstone signal-to-noise ratios will be sufficiently strong to detect radar echoes from Didymos and Dimorphos
but will not provide highly-detailed delay-Doppler images due to the distance. 
If the orbital period of Dimorphos decreases by at least 1%, then the change should be visible in
the positions of Dimorphos in radar images within a few days of impact.

The Didymos system will be below the horizon when the DART spacecraft impacts Dimorphos, but
Goldstone radar observations will be possible beginning 10.6 hours later.


Orbital and Physical Characteristics  
Name                     Didymos & Dimorphos
Number                   65803
Discoverer               Spacewatch
Discovery date           1996 April 11
orbit type               Apollo
Close approach dist.     0.0712 au  (27.7 lunar distances) 
Close approach date      2022 October 4

semimajor axis           1.644 au                  
eccentricity             0.384                     
inclination              3.4 deg                   
Orbital period           2.108 years               
perihelion distance      1.013 au                  
aphelion distance        2.275 au
MOID                     0.040 au                 

absolute magnitude (H)   18.1                      
Primary diameter         0.78 km 
Secondary diameter       0.15 km 
optical albedo           0.15
Primary rotation period  2.259 h
lightcurve amplitude     0.08 mag
Secondary orbital period 11.93 h     
Spectral class           S
                         PHA, Binary

Last update: 2022 February 2


Discovery M.P.E.C.


Didymos (1996 GT)
https://www.minorplanetcenter.net/mpec/J96/J96H02.html


SNR Calculations


Didymos
GOLDSTONE SNRs
Didymos PRIMARY:  D = 0.79 km,  P = 2.26 h,  OC albedo = 0.22,  pole = (310, -84)

In the table below, "delta" is the subradar latitude.
wk  = week
DOY = Day Of Year                                                                        
                                                                 Goldstone
         UTC           UTC        RA  Dec Distance  delta        SNR/  SNR/
wk  DOY  Date        start stop   deg deg    au     deg    runs  day   run   
35  243 2022 Aug 31  07:21-11:00    0 -30   0.149   -32     44     4     1
35  244 2022 Sep  1  07:25-10:56    1 -30   0.145   -32     43     4     1
35  245 2022 Sep  2  07:29-10:51    2 -30   0.141   -33     43     4     1
35  246 2022 Sep  3  07:34-10:47    3 -31   0.137   -34     42     5     1
35  247 2022 Sep  4  07:40-10:42    4 -31   0.134   -35     41     5     1
36  248 2022 Sep  5  07:46-10:38    5 -32   0.130   -35     39     6     1
36  249 2022 Sep  6  07:52-10:33    7 -32   0.126   -36     38     6     1
36  250 2022 Sep  7  08:00-10:29    8 -32   0.123   -37     36     7     1
36  251 2022 Sep  8  08:07-10:24    9 -33   0.120   -38     34     7     1
36  252 2022 Sep  9  08:16-10:19   11 -33   0.116   -38     31     7     1
36  253 2022 Sep 10  08:26-10:13   12 -33   0.113   -39     28     8     1
36  254 2022 Sep 11  08:37-10:07   14 -34   0.110   -40     24     8     2
37  255 2022 Sep 12  08:50-10:00   16 -34   0.107   -41     19     8     2
37  256 2022 Sep 13  09:07-09:49   17 -34   0.104   -42     12     7     2
...Too far south to track during Sep. 14-24...
38  268 2022 Sep 25  10:07-11:08   47 -34   0.078   -50     23    33     7 *  
39  269 2022 Sep 26  09:58-11:33   50 -34   0.076   -50     37    45     8  DART IMPACT: Sep 26 23:14 UT +-10 minutes 
39  270 2022 Sep 27  09:52-11:56   53 -33   0.075   -50     49    56     8             <------20 deg horizons----> 
39  271 2022 Sep 28  09:47-12:17   56 -32   0.074   -50     60    66     9  DSS14/GBT   GBT       GBT/GSSR  Overlap
39  272 2022 Sep 29  09:43-12:38   59 -32   0.073   -49     71    75     9  SNR/RTT    rise-set   overlap   Duration
39  273 2022 Sep 30  09:39-12:58   62 -31   0.072   -49     82    85    10    23       0802-0937  None       None  
39  274 2022 Oct 01  09:35-13:17   65 -30   0.072   -48     92    93    10    23       0748-1007  0935-1007  0:32  
39  275 2022 Oct 02  09:32-13:36   67 -28   0.072   -47    102   100    10    23       0738-1032  0932-1032  1:00 
40  276 2022 Oct 03  09:29-13:54   70 -27   0.071   -46    111   110    11    25       0730-1055  0929-1055  1:26
40  277 2022 Oct 04  09:26-14:12   73 -26   0.071   -45    119   110    11    25       0724-1116  0926-1116  1:47
40  278 2022 Oct 05  09:24-14:28   76 -25   0.071   -44    127   120    11    25       0719-1136  0924-1136  2:12  
40  279 2022 Oct 06  09:21-14:44   78 -23   0.072   -43    135   120    11    25       0714-1154  0921-1154  2:33
40  280 2022 Oct 07  09:18-14:59   81 -22   0.072   -41    141   120    11    25       0709-1211  0918-1211  2:53
40  281 2022 Oct 08  09:16-15:13   83 -21   0.072   -40    147   120    11    25       0705-1226  0916-1226  3:10
40  282 2022 Oct 09  09:14-15:26   86 -19   0.073   -38    152   120    10    23       0701-1241  0914-1241  3:27
41  283 2022 Oct 10  09:11-15:38   88 -18   0.074   -37    156   120    10    23       0658-1255  0911-1255  3:44
41  284 2022 Oct 11  09:09-15:50   90 -16   0.075   -35    160   110    10    23       0654-1307  0909-1307  3:58
41  285 2022 Oct 12  09:07-16:00   92 -15   0.076   -33    162   110     9    21       0651-1319  0907-1319  4:12
41  286 2022 Oct 13  09:05-16:10   94 -13   0.077   -32    165   100     9    21       0648-1330  0905-1330  4:25
41  287 2022 Oct 14  09:02-16:19   96 -12   0.078   -30    166    99     8    18       0645-1340  0902-1340  4:38
41  288 2022 Oct 15  09:00-16:27   98 -11   0.080   -29    168    93     8    18       0642-1349  0900-1349  4:49 
41  289 2022 Oct 16  08:58-16:35   99  -9   0.081   -27    168    88     7    16       0639-1358  0858-1358  5:00
42  290 2022 Oct 17  08:56-16:42  101  -8   0.083   -26    168    82     7    16       0636-1405  0856-1405  5:09
42  291 2022 Oct 18  08:53-16:48  103  -7   0.085   -24    168    77     6    14       0633-1412  0853-1412  5:19
42  292 2022 Oct 19  08:51-16:54  104  -6   0.086   -23    168    72     6    14       0630-1419  0851-1419  5:28
42  293 2022 Oct 20  08:49-17:00  105  -5   0.088   -22    167    67     6    14       0627-1425  0849-1425  5:36
42  294 2022 Oct 21  08:46-17:04  107  -4   0.090   -20    166    62     5    11       0624-1430  0846-1430  5:44
42  295 2022 Oct 22  08:44-17:09  108  -3   0.092   -19    165    57     5    11       0621-1435  0844-1435  5:51
42  296 2022 Oct 23  08:41-17:13  109  -2   0.094   -18    164    53     5 *  11       0618-1439  0841-1439  5:58
43  297 2022 Oct 24  08:38-17:16  110  -1   0.095   -17    163    49     4     9  
43  298 2022 Oct 25  08:36-17:19  111   0   0.097   -16    161    46     4
43  299 2022 Oct 26  08:33-17:22  112  +1   0.099   -15    159    42     4
43  300 2022 Oct 27  08:30-17:25  113  +2   0.102   -14    158    39     3
43  301 2022 Oct 28  08:28-17:27  114  +3   0.104   -13    156    36     3
43  302 2022 Oct 29  08:25-17:29  115  +4   0.106   -12    154    34     3
43  303 2022 Oct 30  08:22-17:30  116  +5   0.108   -11    153    31     3
44  304 2022 Oct 31  08:19-17:31  116  +5   0.110   -10    151    29     3
44  305 2022 Nov 01  08:16-17:32  117  +6   0.112    -9    149    27     2
44  306 2022 Nov 02  08:13-17:33  118  +7   0.114    -8    147    25     2
44  307 2022 Nov 03  08:09-17:34  119  +7   0.116    -7    146    23     2
44  308 2022 Nov 04  08:06-17:34  119  +8   0.118    -7    144    22     2
44  309 2022 Nov 05  08:03-17:34  120  +9   0.121    -6    142    20     2
44  310 2022 Nov 06  08:00-17:34  120  +9   0.123    -5    141    19     2
45  311 2022 Nov 07  07:56-17:34  121 +10   0.125    -4    139    18     2
45  312 2022 Nov 08  07:53-17:34  121 +10   0.127    -4    137    17     2
45  313 2022 Nov 09  07:49-17:33  122 +11   0.129    -3    136    16     1
45  314 2022 Nov 10  07:46-17:33  122 +11   0.131    -3    134    15     1
45  315 2022 Nov 11  07:42-17:32  123 +12   0.133    -2    133    14     1
45  316 2022 Nov 12  07:38-17:31  123 +12   0.135    -1    131    13     1
45  317 2022 Nov 13  07:34-17:30  124 +13   0.138    -1    130    12     1
46  318 2022 Nov 14  07:31-17:28  124 +13   0.140     0    128    12     1
46  319 2022 Nov 15  07:27-17:27  124 +14   0.142     0    127    11     1
46  320 2022 Nov 16  07:23-17:25  124 +14   0.144    +1    126    10     1
46  321 2022 Nov 17  07:19-17:24  125 +15   0.146    +1    124    10     1
46  322 2022 Nov 18  07:15-17:22  125 +15   0.148    +2    123     9     1
46  323 2022 Nov 19  07:10-17:20  125 +16   0.150    +2    122     9     1
46  324 2022 Nov 20  07:06-17:18  125 +16   0.152    +3    121     8     1

SNR/run for Dimorphos will be about 1/5th as strong as SNRs for the primary. 
Dimorphos monostatic SNR/run = 2 from Sep. 27-Oct 15.

Bandwidths:
Sep 26  B = 22 Hz (subradar latitude = -50 deg)
Oct 23  B = 32 Hz (subradar latitude = -18 deg).
Observations in 2022 will show the southern hemisphere better than in 2003 but
will not show the northern hemisphere as well.  The north pole will not be imaged
due to geometry.

The DART impact occurs 11.7 h after the Sep 26 Goldstone view period ends and 10.6 h 
before the Sep. 27 Goldstone view period starts.
Based on updated photometry measurements of mutual events 
from 2021 (Scheirich and Pravec, pers. comm.), we expect Dimorphos to be between 
Earth and the primary at the beginning of the Sep. 27 radar observing window.


Track Assignments




Goldstone tracks:
     UT                     UT          PDT                 Duration Round-trip  
DOY  Date       Target      TX Window   TX Window           hh:mm    time (sec)  SNR/run      

...Not available yet, but dates requested at Goldstone are from Sep. 25-Oct. 23...



Uncertainties


Didymos
JPL/Horizons solution 181, # obs: 1046 (1996-2021)
2022 January 17
 Date__(UT)__HR:MN     R.A._(a-appar)_DEC.             delta  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2022-Sep-20 00:00 *    31.70319 -35.41597  0.08745223420346       1.027         0.95       0.000056
 2022-Sep-21 00:00 *    34.24564 -35.36847  0.08536882059917       1.054         1.03       0.000058
 2022-Sep-22 00:00 *m   36.88179 -35.24800  0.08341156695822       1.081         1.11       0.000060
 2022-Sep-23 00:00 *m   39.60495 -35.04780  0.08158509904376       1.106         1.19       0.000065
 2022-Sep-24 00:00 *m   42.40643 -34.76147  0.07989408177049       1.130         1.26       0.000071
 2022-Sep-25 00:00 *m   45.27559 -34.38334  0.07834313276282       1.151         1.34       0.000079 *
 2022-Sep-26 00:00 *m   48.19993 -33.90875  0.07693672222704       1.170         1.41       0.000088
 2022-Sep-27 00:00 *m   51.16543 -33.33429  0.07567906130858       1.185         1.47       0.000099
 2022-Sep-28 00:00 *m   54.15680 -32.65815  0.07457398232188       1.198         1.53       0.000111
 2022-Sep-29 00:00 *m   57.15806 -31.88030  0.07362481531653       1.206         1.58       0.000124
 2022-Sep-30 00:00 *m   60.15296 -31.00264  0.07283426626850       1.210         1.62       0.000137
 2022-Oct-01 00:00 *m   63.12553 -30.02907  0.07220430270327       1.209         1.65       0.000151
 2022-Oct-02 00:00 *m   66.06062 -28.96545  0.07173605275815       1.203         1.66       0.000166
 2022-Oct-03 00:00 *m   68.94428 -27.81940  0.07142972355728       1.193         1.67       0.000181
 2022-Oct-04 00:00 *m   71.76415 -26.60010  0.07128454425138       1.178         1.66       0.000195
 2022-Oct-05 00:00 *m   74.50968 -25.31792  0.07129873809928       1.158         1.64       0.000210
 2022-Oct-06 00:00 *m   77.17225 -23.98404  0.07146952650340       1.134         1.61       0.000225
 2022-Oct-07 00:00 *m   79.74517 -22.61005  0.07179316598072       1.106         1.56       0.000240
 2022-Oct-08 00:00 *    82.22361 -21.20753  0.07226501674297       1.075         1.51       0.000254
 2022-Oct-09 00:00 *    84.60446 -19.78770  0.07287963906740       1.041         1.46       0.000267
 2022-Oct-10 00:00 *    86.88613 -18.36111  0.07363091130785       1.004         1.39       0.000280
 2022-Oct-11 00:00 *    89.06834 -16.93738  0.07451216171095       0.966         1.32       0.000293
 2022-Oct-12 00:00 *    91.15193 -15.52506  0.07551630560529       0.927         1.25       0.000305
 2022-Oct-13 00:00 *    93.13860 -14.13154  0.07663598016247       0.887         1.18       0.000316
 2022-Oct-14 00:00 *    95.03078 -12.76301  0.07786367052325       0.846         1.11       0.000326
 2022-Oct-15 00:00 *    96.83141 -11.42449  0.07919182311650       0.806         1.04       0.000336
 2022-Oct-16 00:00 *    98.54381 -10.11993  0.08061294397593       0.767         0.96       0.000346
 2022-Oct-17 00:00 *   100.17155  -8.85226  0.08211968147879       0.729         0.90       0.000354
 2022-Oct-18 00:00 *   101.71830  -7.62352  0.08370489409934       0.691         0.83       0.000362
 2022-Oct-19 00:00 *   103.18782  -6.43500  0.08536170450870       0.655         0.77       0.000369
 2022-Oct-20 00:00 *   104.58382  -5.28729  0.08708354171029       0.621         0.71       0.000376
 2022-Oct-21 00:00 *   105.90993  -4.18045  0.08886417290732       0.588         0.65       0.000382
 2022-Oct-22 00:00 *   107.16969  -3.11408  0.09069772646671       0.557         0.59       0.000388
 2022-Oct-23 00:00 *m  108.36646  -2.08743  0.09257870670052       0.527         0.54       0.000393
 2022-Oct-24 00:00 *m  109.50351  -1.09945  0.09450200034572       0.500         0.49       0.000397
 2022-Oct-25 00:00 *m  110.58391  -0.14888  0.09646287385445       0.474         0.45       0.000402
 2022-Oct-26 00:00 *m  111.61059   0.76568  0.09845696035835       0.449         0.41       0.000405
 2022-Oct-27 00:00 *m  112.58635   1.64573  0.10048023588928       0.426         0.37       0.000409
 2022-Oct-28 00:00 *m  113.51381   2.49282  0.10252898621625       0.405         0.33       0.000412
 2022-Oct-29 00:00 *m  114.39547   3.30852  0.10459976789803       0.386         0.29       0.000415
 2022-Oct-30 00:00 *m  115.23365   4.09436  0.10668936871903       0.368         0.26       0.000417
 2022-Oct-31 00:00 *m  116.03054   4.85188  0.10879477264391       0.351         0.23       0.000419


Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination: Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu% 2022-Apr-02 00:00 291.99994 -22.26104 1.77200469334999 22.051 5.623 81.9477 /L 90.7/ 0.6489 2022-Apr-04 00:00 292.96563 -22.17005 1.74214671591865 22.012 5.620 83.0234 /L 115.0/ 7.6537 2022-Apr-06 00:00 293.92772 -22.07537 1.71229540145154 21.973 5.616 84.0990 /L 138.4/ 20.9223 2022-Apr-08 00:00 294.88615 -21.97721 1.68246359846677 21.932 5.612 85.1747 /L 161.0/ 38.0883 2022-Apr-10 00:00 295.84085 -21.87573 1.65266341423351 21.890 5.608 86.2504 /L 174.1/ 56.9649 2022-Apr-12 00:00 296.79179 -21.77110 1.62290619353281 21.847 5.603 87.3260 /L 151.9/ 75.3497 2022-Apr-14 00:00 297.73895 -21.66349 1.59320241346413 21.803 5.598 88.4017 /L 127.2/ 90.5286 2022-Apr-16 00:00 298.68233 -21.55306 1.56356149103952 21.758 5.592 89.4775 /L 100.9/ 99.1175 2022-Apr-18 00:00 299.62199 -21.43996 1.53399171642384 21.712 5.587 90.5537 /L 73.3/ 98.0258 2022-Apr-20 00:00 300.55791 -21.32440 1.50450066420364 21.664 5.581 91.6304 /L 45.1/ 86.4511 2022-Apr-22 00:00 301.48993 -21.20661 1.47509613709904 21.616 5.574 92.7079 /L 17.3/ 66.9947 2022-Apr-24 00:00 302.41779 -21.08684 1.44578709747109 21.566 5.567 93.7867 /L 11.1/ 44.4500 2022-Apr-26 00:00 303.34125 -20.96533 1.41658401289484 21.516 5.560 94.8669 /L 37.0/ 23.6877 2022-Apr-28 00:00 304.26015 -20.84231 1.38749861773167 21.464 5.552 95.9487 /L 62.5/ 8.4115 2022-Apr-30 00:00 305.17438 -20.71804 1.35854340431020 21.411 5.544 97.0323 /L 87.2/ 0.7652 2022-May-02 00:00 306.08388 -20.59278 1.32973106901852 21.356 5.535 98.1176 /L 111.1/ 1.2829 2022-May-04 00:00 306.98861 -20.46683 1.30107403673413 21.301 5.526 99.2048 /L 134.3/ 9.1549 2022-May-06 00:00 307.88853 -20.34046 1.27258414767232 21.244 5.517 100.2937 /L 157.0/ 22.7921 2022-May-08 00:00 308.78362 -20.21396 1.24427251318137 21.186 5.507 101.3846 /L 176.4/ 40.3480 2022-May-10 00:00 309.67388 -20.08761 1.21614944998712 21.126 5.497 102.4772 /L 156.0/ 59.8307 2022-May-12 00:00 310.55938 -19.96166 1.18822436875450 21.065 5.486 103.5718 /L 131.3/ 78.7322 2022-May-14 00:00 311.44019 -19.83638 1.16050556378907 21.003 5.475 104.6684 /L 104.8/ 93.5225 2022-May-16 00:00 312.31643 -19.71204 1.13300005588855 20.940 5.464 105.7672 /L 76.7/ 99.9547 2022-May-18 00:00 313.18811 -19.58897 1.10571389691295 20.875 5.452 106.8685 /L 47.6/ 95.1235 2022-May-20 00:00 314.05508 -19.46755 1.07865318148397 20.809 5.439 107.9726 /L 18.9/ 79.9353 2022-May-22 00:00 314.91707 -19.34818 1.05182519815102 20.741 5.426 109.0801 /L 9.532/ 58.8148 2022-May-24 00:00 315.77384 -19.23128 1.02523884404206 20.672 5.412 110.1913 /L 35.5/ 36.9658 2022-May-26 00:00 316.62523 -19.11724 0.99890425539932 20.601 5.398 111.3066 /L 60.6/ 18.4194 2022-May-28 00:00 317.47116 -19.00652 0.97283219954557 20.529 5.384 112.4261 /L 84.8/ 5.7291 2022-May-30 00:00 318.31157 -18.89956 0.94703356235587 20.455 5.369 113.5501 /L 108.3/ 0.2201 2022-Jun-01 00:00 319.14644 -18.79683 0.92151896728288 20.379 5.353 114.6786 /L 131.4/ 2.1667 2022-Jun-03 00:00 319.97576 -18.69878 0.89629849746522 20.302 5.337 115.8116 /L 154.2/ 10.9678 2022-Jun-05 00:00 320.79958 -18.60589 0.87138151122745 20.224 5.320 116.9491 /L 176.6/ 25.4196 2022-Jun-07 00:00 321.61800 -18.51862 0.84677652062457 20.143 5.303 118.0911 /L 159.0/ 43.9163 2022-Jun-09 00:00 322.43118 -18.43740 0.82249105977009 20.061 5.285 119.2375 /L 134.3/ 64.3137 2022-Jun-11 00:00 323.23935 -18.36270 0.79853148170224 19.977 5.266 120.3882 /L 107.8/ 83.4103 2022-Jun-13 00:00 324.04274 -18.29499 0.77490277149168 19.892 5.247 121.5433 /L 79.4/ 96.6629 2022-Jun-15 00:00 324.84148 -18.23482 0.75160874621916 19.805 5.227 122.7029 /L 49.9/ 99.5259 2022-Jun-17 00:00 325.63550 -18.18284 0.72865302018041 19.716 5.207 123.8673 /L 20.4/ 90.5530 2022-Jun-19 00:00 326.42458 -18.13974 0.70604030727921 19.625 5.186 125.0369 /L 8.016/ 72.8201 2022-Jun-21 00:00 327.20856 -18.10623 0.68377698121166 19.532 5.164 126.2121 /L 34.6/ 51.5428 2022-Jun-23 00:00 327.98737 -18.08305 0.66187064703845 19.437 5.142 127.3928 /L 59.7/ 31.2027 2022-Jun-25 00:00 328.76105 -18.07095 0.64032941305621 19.341 5.119 128.5793 /L 83.7/ 14.7570 2022-Jun-27 00:00 329.52969 -18.07068 0.61916135254724 19.242 5.095 129.7712 /L 107.0/ 4.0374 2022-Jun-29 00:00 330.29348 -18.08302 0.59837417175323 19.142 5.071 130.9682 /L 130.0/ 0.1110 2022-Jul-01 00:00 331.05268 -18.10874 0.57797496759145 19.039 5.045 132.1696 /L 153.0/ 3.3457 2022-Jul-03 00:00 331.80771 -18.14857 0.55797001746816 18.935 5.020 133.3747 /L 176.1/ 13.3932 2022-Jul-05 00:00 332.55908 -18.20327 0.53836459478563 18.828 4.993 134.5825 /L 159.8/ 29.2314 2022-Jul-07 00:00 333.30747 -18.27353 0.51916279583633 18.720 4.966 135.7918 /L 135.0/ 49.1398 2022-Jul-09 00:00 334.05370 -18.36011 0.50036735031133 18.609 4.938 137.0011 /L 108.6/ 70.3767 2022-Jul-11 00:00 334.79863 -18.46374 0.48197947110552 18.497 4.909 138.2088 /L 80.4/ 88.7176 2022-Jul-13 00:00 335.54310 -18.58530 0.46399902673707 18.383 4.879 139.4132 /L 50.9/ 98.9565 2022-Jul-15 00:00 336.28775 -18.72578 0.44642540923651 18.266 4.849 140.6126 /L 21.3/ 97.5313 2022-Jul-17 00:00 337.03312 -18.88624 0.42925884007709 18.148 4.819 141.8049 /L 8.550/ 85.2705 2022-Jul-19 00:00 337.77986 -19.06779 0.41250105324882 18.028 4.788 142.9878 /L 35.0/ 66.5302 2022-Jul-21 00:00 338.52886 -19.27153 0.39615488806650 17.906 4.756 144.1583 /L 60.2/ 46.0357 2022-Jul-23 00:00 339.28127 -19.49851 0.38022346633799 17.782 4.724 145.3125 /L 84.1/ 27.2043 2022-Jul-25 00:00 340.03853 -19.74974 0.36470959239007 17.657 4.691 146.4455 /L 107.3/ 12.2854 2022-Jul-27 00:00 340.80239 -20.02616 0.34961543425828 17.530 4.659 147.5516 /L 130.2/ 2.9010 2022-Jul-29 00:00 341.57499 -20.32863 0.33494231598655 17.402 4.626 148.6239 /L 152.9/ 0.2454 2022-Jul-31 00:00 342.35893 -20.65791 0.32069050722114 17.273 4.593 149.6540 /L 172.2/ 4.9376 2022-Aug-02 00:00 343.15728 -21.01466 0.30685899858099 17.143 4.561 150.6327 /L 157.0/ 16.7802 2022-Aug-04 00:00 343.97370 -21.39940 0.29344530290521 17.012 4.529 151.5490 /L 132.6/ 34.5970 2022-Aug-06 00:00 344.81237 -21.81260 0.28044532195628 16.882 4.499 152.3910 /L 106.6/ 56.0625 2022-Aug-08 00:00 345.67800 -22.25472 0.26785334124554 16.751 4.469 153.1455 /L 79.2/ 77.4149 2022-Aug-10 00:00 346.57566 -22.72627 0.25566233394329 16.621 4.442 153.7988 /L 50.8/ 93.5692 2022-Aug-12 00:00 347.51075 -23.22786 0.24386481218219 16.493 4.417 154.3369 /L 23.5/ 99.8037 2022-Aug-14 00:00 348.48906 -23.76014 0.23245404430208 16.366 4.394 154.7460 /L 15.1/ 94.6171 2022-Aug-16 00:00 349.51709 -24.32361 0.22142479717543 16.241 4.375 155.0130 /L 37.6/ 80.5441 2022-Aug-18 00:00 350.60243 -24.91848 0.21077308538909 16.118 4.359 155.1260 /L 61.8/ 61.8686 2022-Aug-20 00:00 351.75395 -25.54455 0.20049545043714 15.998 4.347 155.0750 /L 84.9/ 42.3096 2022-Aug-22 00:00 352.98205 -26.20116 0.19058845505551 15.881 4.339 154.8526 /L 107.1/ 24.4982 2022-Aug-24 00:00 354.29883 -26.88704 0.18104853054701 15.767 4.335 154.4542 /L 128.4/ 10.4434 2022-Aug-26 00:00 355.71838 -27.60020 0.17187200452604 15.657 4.335 153.8785 /L 148.1/ 1.9506 2022-Aug-28 00:00 357.25706 -28.33775 0.16305515512370 15.550 4.339 153.1272 /L 159.5/ 0.5879 2022-Aug-30 00:00 358.93382 -29.09569 0.15459425790731 15.447 4.348 152.2041 /L 149.4/ 7.2375 2022-Sep-01 00:00 0.77043 -29.86868 0.14648570083171 15.347 4.360 151.1144 /L 128.7/ 21.5572 2022-Sep-03 00:00 2.79166 -30.64976 0.13872628380913 15.249 4.375 149.8640 /L 105.4/ 41.6762 2022-Sep-05 00:00 5.02521 -31.43010 0.13131378523989 15.155 4.394 148.4585 /L 81.3/ 64.1620 2022-Sep-07 00:00 7.50143 -32.19847 0.12424783858449 15.065 4.416 146.9023 /L 57.9/ 84.2787 2022-Sep-09 00:00 10.25274 -32.94059 0.11753112357427 14.977 4.440 145.1981 /L 38.5/ 97.0597 2022-Sep-11 00:00 13.31276 -33.63804 0.11117067830269 14.894 4.467 143.3469 /L 31.9/ 99.4352 2022-Sep-13 00:00 16.71487 -34.26688 0.10517883793278 14.815 4.497 141.3482 /L 42.1/ 91.7806 2022-Sep-15 00:00 20.48989 -34.79635 0.09957344296368 14.742 4.530 139.2001 /L 58.5/ 77.0764 2022-Sep-17 00:00 24.66232 -35.18800 0.09437753704874 14.676 4.565 136.9006 /L 75.2/ 58.8244 2022-Sep-19 00:00 29.24492 -35.39566 0.08961894092749 14.618 4.602 134.4488 /L 90.8/ 39.8728 2022-Sep-21 00:00 34.23196 -35.36688 0.08532971849281 14.571 4.642 131.8465 /L 104.7/ 22.4695 2022-Sep-23 00:00 39.59226 -35.04636 0.08154524565325 14.537 4.684 129.1013 /L 116.4/ 8.7570 2022-Sep-25 00:00 45.26430 -34.38188 0.07830256739740 14.517 4.728 126.2293 /L 125.3/ 1.0291 2022-Sep-27 00:00 51.15592 -33.33254 0.07563787061862 14.515 4.773 123.2581 /L 130.0/ 1.3697 2022-Sep-29 00:00 57.15060 -31.87796 0.07358313582777 14.531 4.819 120.2284 /L 129.8/ 10.7154 2022-Oct-01 00:00 63.12025 -30.02581 0.07216231693119 14.566 4.866 117.1938 /L 125.1/ 27.9871 2022-Oct-03 00:00 68.94115 -27.81492 0.07138764868352 14.620 4.911 114.2186 /L 116.9/ 50.0117 2022-Oct-05 00:00 74.50855 -25.31201 0.07125680818205 14.692 4.954 111.3722 /L 106.1/ 72.2293 2022-Oct-07 00:00 79.74578 -22.60261 0.07175161084600 14.779 4.995 108.7221 /L 93.4/ 89.7975 2022-Oct-09 00:00 84.60652 -19.77875 0.07283866430448 14.877 5.031 106.3274 /L 79.3/ 98.9978 2022-Oct-11 00:00 89.07153 -16.92704 0.07447193382338 14.983 5.062 104.2329 /L 64.9/ 98.5238 2022-Oct-13 00:00 93.14264 -14.11999 0.07659661908038 15.092 5.088 102.4666 /L 51.4/ 89.6092 2022-Oct-15 00:00 96.83604 -11.41196 0.07915340194135 15.202 5.109 101.0396 /L 40.9/ 74.8479 2022-Oct-17 00:00 100.17655 -8.83897 0.08208223160867 15.309 5.123 99.9489 /L 36.7/ 56.9102 2022-Oct-19 00:00 103.19303 -6.42115 0.08532522369687 15.410 5.133 99.1803 /L 41.7/ 38.0875 2022-Oct-21 00:00 105.91521 -4.16623 0.08882863413003 15.506 5.137 98.7132 /L 54.6/ 20.5753 2022-Oct-23 00:00 108.37170 -2.07299 0.09254406643201 15.594 5.137 98.5233 /L 72.6/ 6.9586 2022-Oct-25 00:00 110.58902 -0.13433 0.09642907904575 15.675 5.132 98.5852 /L 93.9/ 0.2682 2022-Oct-27 00:00 112.59127 1.66029 0.10044722943167 15.749 5.124 98.8739 /L 117.2/ 3.0471 2022-Oct-29 00:00 114.40015 3.32303 0.10456749261168 15.815 5.114 99.3659 /L 140.6/ 15.6979 2022-Oct-31 00:00 116.03495 4.86628 0.10876317396567 15.874 5.101 100.0391 /L 158.0/ 35.6521 2022-Nov-02 00:00 117.51242 6.30200 0.11301078152565 15.928 5.086 100.8742 /L 151.5/ 58.3380 2022-Nov-04 00:00 118.84674 7.64135 0.11728931808585 15.976 5.069 101.8544 /L 129.8/ 78.9009 2022-Nov-06 00:00 120.04952 8.89474 0.12158009697143 16.018 5.051 102.9658 /L 105.5/ 93.4522 2022-Nov-08 00:00 121.12987 10.07188 0.12586695129411 16.056 5.032 104.1975 /L 81.1/ 99.7757 2022-Nov-10 00:00 122.09477 11.18187 0.13013665688457 16.089 5.012 105.5409 /L 57.3/ 97.5846 2022-Nov-12 00:00 122.94934 12.23312 0.13437935384656 16.118 4.991 106.9894 /L 34.5/ 88.1392 2022-Nov-14 00:00 123.69739 13.23338 0.13858878909217 16.143 4.970 108.5379 /L 14.7/ 73.4204 2022-Nov-16 00:00 124.34172 14.18963 0.14276236450087 16.165 4.948 110.1826 /L 17.7/ 55.4731 2022-Nov-18 00:00 124.88444 15.10806 0.14690111653628 16.184 4.925 111.9201 /L 39.1/ 36.3219 2022-Nov-20 00:00 125.32714 15.99408 0.15100975711801 16.199 4.901 113.7477 /L 63.5/ 18.3939 2022-Nov-22 00:00 125.67121 16.85227 0.15509678550695 16.213 4.877 115.6630 /L 89.9/ 5.0050 2022-Nov-24 00:00 125.91808 17.68643 0.15917446487638 16.224 4.852 117.6633 /L 118.2/ 0.0249 2022-Nov-26 00:00 126.06957 18.49944 0.16325827595602 16.233 4.827 119.7453 /L 147.4/ 5.9735 2022-Nov-28 00:00 126.12795 19.29329 0.16736573347746 16.241 4.800 121.9052 /L 174.2/ 21.8285 2022-Nov-30 00:00 126.09587 20.06915 0.17151521133923 16.248 4.772 124.1387 /L 153.4/ 43.2860 2022-Dec-02 00:00 125.97614 20.82747 0.17572556199304 16.254 4.744 126.4415 /L 126.0/ 65.2090 2022-Dec-04 00:00 125.77149 21.56824 0.18001648649646 16.259 4.714 128.8092 /L 99.3/ 83.4849 2022-Dec-06 00:00 125.48464 22.29101 0.18440911263612 16.263 4.684 131.2376 /L 73.3/ 95.4726 2022-Dec-08 00:00 125.11835 22.99502 0.18892645332746 16.268 4.652 133.7223 /L 48.0/ 99.9181 2022-Dec-10 00:00 124.67565 23.67911 0.19359366412245 16.272 4.618 136.2585 /L 23.3/ 96.8103 2022-Dec-12 00:00 124.16009 24.34182 0.19843806951523 16.276 4.583 138.8408 /L 1.179/ 87.0841 2022-Dec-14 00:00 123.57592 24.98135 0.20348895955971 16.281 4.547 141.4629 /L 25.3/ 72.1865 2022-Dec-16 00:00 122.92826 25.59563 0.20877723479834 16.285 4.508 144.1174 /L 50.1/ 53.7914 2022-Dec-18 00:00 122.22315 26.18245 0.21433501226410 16.291 4.468 146.7957 /L 76.0/ 33.9409 2022-Dec-20 00:00 121.46763 26.73947 0.22019522708602 16.297 4.426 149.4878 /L 103.6/ 15.6024 2022-Dec-22 00:00 120.66979 27.26442 0.22639106521601 16.304 4.383 152.1812 /L 133.0/ 3.0380 2022-Dec-24 00:00 119.83870 27.75514 0.23295487135408 16.312 4.337 154.8614 /L 163.7/ 0.6427 2022-Dec-26 00:00 118.98425 28.20972 0.23991646233806 16.321 4.289 157.5100 /L 164.9/ 9.9461 2022-Dec-28 00:00 118.11664 28.62663 0.24730171056538 16.332 4.240 160.1041 /L 135.0/ 27.9921 2022-Dec-30 00:00 117.24589 29.00487 0.25513242173673 16.344 4.190 162.6135 /L 106.5/ 49.5253 2023-Jan-01 00:00 116.38142 29.34403 0.26342721292250 16.359 4.140 164.9961 /L 79.6/ 69.9367 2023-Jan-03 00:00 115.53183 29.64427 0.27220240304631 16.378 4.091 167.1881 /L 53.8/ 86.1864 2023-Jan-05 00:00 114.70490 29.90627 0.28147252477072 16.405 4.047 169.0893 /L 28.9/ 96.4639 2023-Jan-07 00:00 113.90758 30.13110 0.29125057979147 16.445 4.015 170.5470 /L 5.480/ 99.8399 2023-Jan-09 00:00 113.14605 30.32018 0.30154817789007 16.507 4.002 171.3661 /L 20.6/ 96.1652 2023-Jan-11 00:00 112.42575 30.47519 0.31237559724747 16.598 4.017 171.3992 /L 44.8/ 85.9932 2023-Jan-13 00:00 111.75141 30.59799 0.32374178246960 16.717 4.057 170.6746 /T 69.4/ 70.4252 2023-Jan-15 00:00 111.12708 30.69061 0.33565432070698 16.854 4.115 169.3798 /T 94.9/ 51.0631 2023-Jan-17 00:00 110.55618 30.75516 0.34811940414079 17.001 4.181 167.7240 /T 121.9/ 30.3286 2023-Jan-19 00:00 110.04154 30.79379 0.36114165540739 17.150 4.249 165.8604 /T 150.5/ 12.0583 2023-Jan-21 00:00 109.58540 30.80867 0.37472356344416 17.300 4.316 163.8851 /T 175.9/ 1.3474 2023-Jan-23 00:00 109.18941 30.80190 0.38886451690974 17.449 4.381 161.8561 /T 147.7/ 2.1710 2023-Jan-25 00:00 108.85450 30.77550 0.40356020851548 17.595 4.444 159.8086 /T 117.8/ 14.1985 2023-Jan-27 00:00 108.58086 30.73141 0.41880331569089 17.738 4.503 157.7642 /T 89.5/ 33.0928 2023-Jan-29 00:00 108.36785 30.67149 0.43458500294615 17.878 4.559 155.7364 /T 63.1/ 53.8388 2023-Jan-31 00:00 108.21416 30.59746 0.45089608071158 18.015 4.613 153.7334 /T 38.2/ 72.8080 2023-Feb-01 00:00 108.15903 30.55566 0.45924730074241 18.082 4.639 152.7429 /T 26.1/ 80.8788 2023-Feb-03 00:00 108.09091 30.46338 0.47633556287644 18.215 4.688 150.7857 /T 3.944/ 93.1589 2023-Feb-05 00:00 108.07720 30.36061 0.49393109514608 18.344 4.735 148.8621 /T 21.9/ 99.2821 2023-Feb-07 00:00 108.11564 30.24850 0.51202561758691 18.471 4.780 146.9729 /T 45.5/ 98.4826 2023-Feb-09 00:00 108.20397 30.12803 0.53061121581007 18.594 4.823 145.1186 /T 69.5/ 90.6427 2023-Feb-11 00:00 108.33998 30.00007 0.54968028078727 18.715 4.863 143.2987 /T 94.0/ 76.4016 2023-Feb-13 00:00 108.52155 29.86535 0.56922536222678 18.833 4.902 141.5130 /T 119.5/ 57.2242 2023-Feb-15 00:00 108.74667 29.72451 0.58923891803124 18.949 4.939 139.7606 /T 146.4/ 35.6519 2023-Feb-17 00:00 109.01342 29.57811 0.60971286814880 19.061 4.974 138.0410 /T 174.3/ 15.7362 2023-Feb-19 00:00 109.31991 29.42658 0.63063785785333 19.172 5.008 136.3536 /T 155.3/ 2.7519 2023-Feb-21 00:00 109.66435 29.27029 0.65200248861144 19.279 5.040 134.6977 /T 125.4/ 0.8772 2023-Feb-23 00:00 110.04492 29.10949 0.67379328698271 19.384 5.071 133.0725 /T 96.5/ 10.2209 2023-Feb-25 00:00 110.45974 28.94445 0.69599574998177 19.487 5.100 131.4772 /T 69.4/ 27.0481 2023-Feb-27 00:00 110.90680 28.77539 0.71859561514339 19.587 5.129 129.9104 /T 44.1/ 46.7848 2023-Mar-01 00:00 111.38403 28.60251 0.74157949479020 19.685 5.155 128.3709 /T 20.2/ 65.9776 2023-Mar-03 00:00 111.88939 28.42598 0.76493493684919 19.780 5.181 126.8573 /T 3.512/ 82.3159 2023-Mar-05 00:00 112.42096 28.24589 0.78865032172371 19.874 5.206 125.3683 /T 26.4/ 94.0357 2023-Mar-07 00:00 112.97693 28.06233 0.81271480458359 19.965 5.230 123.9025 /T 49.8/ 99.6054 2023-Mar-09 00:00 113.55566 27.87533 0.83711829572455 20.053 5.252 122.4588 /T 73.8/ 97.8709 2023-Mar-11 00:00 114.15565 27.68491 0.86185138221253 20.140 5.274 121.0358 /T 98.5/ 88.4649 2023-Mar-13 00:00 114.77558 27.49110 0.88690510843368 20.225 5.295 119.6327 /T 124.0/ 72.1714 2023-Mar-15 00:00 115.41423 27.29389 0.91227059524211 20.308 5.315 118.2483 /T 150.5/ 51.1223 2023-Mar-17 00:00 116.07050 27.09330 0.93793850974715 20.389 5.334 116.8819 /T 178.0/ 28.9310 2023-Mar-19 00:00 116.74334 26.88928 0.96389841701821 20.468 5.353 115.5329 /T 153.3/ 10.5327 2023-Mar-21 00:00 117.43179 26.68177 0.99013821457406 20.545 5.370 114.2008 /T 124.4/ 0.8428 2023-Mar-23 00:00 118.13498 26.47070 1.01664412869596 20.620 5.387 112.8851 /T 96.1/ 2.2173 2023-Mar-25 00:00 118.85201 26.25603 1.04340154045819 20.693 5.404 111.5852 /T 69.2/ 13.1812 2023-Mar-27 00:00 119.58188 26.03775 1.07039610046723 20.765 5.419 110.3006 /T 44.0/ 30.0284 2023-Mar-29 00:00 120.32355 25.81589 1.09761437616798 20.835 5.434 109.0304 /T 20.2/ 49.1176 2023-Mar-31 00:00 121.07600 25.59044 1.12504393870227 20.903 5.448 107.7739 /T 2.857/ 67.7283 2023-Apr-02 00:00 121.83829 25.36142 1.15267323961236 20.970 5.462 106.5305 /T 25.8/ 83.7470 2023-Apr-04 00:00 122.60956 25.12880 1.18049153543417 21.035 5.475 105.2994 /T 49.3/ 95.1598 2023-Apr-06 00:00 123.38902 24.89258 1.20848889622315 21.099 5.488 104.0798 /T 73.5/ 99.9367 2023-Apr-08 00:00 124.17602 24.65275 1.23665618507438 21.161 5.500 102.8712 /T 98.7/ 96.4985 2023-Apr-10 00:00 124.96999 24.40931 1.26498484775256 21.221 5.511 101.6728 /T 124.7/ 84.5344 2023-Apr-12 00:00 125.77039 24.16227 1.29346643721464 21.280 5.522 100.4842 /T 151.5/ 65.5906 2023-Apr-14 00:00 126.57674 23.91164 1.32209196805306 21.338 5.532 99.3049 /T 178.6/ 43.0489 2023-Apr-16 00:00 127.38859 23.65739 1.35085130050329 21.394 5.542 98.1346 /T 153.4/ 21.5847 2023-Apr-18 00:00 128.20558 23.39948 1.37973277042916 21.449 5.552 96.9732 /T 125.5/ 6.1020 2023-Apr-20 00:00 129.02740 23.13786 1.40872329398049 21.503 5.561 95.8203 /T 98.1/ 0.0413 2023-Apr-22 00:00 129.85369 22.87254 1.43780903503940 21.555 5.569 94.6759 /T 71.8/ 3.9574 2023-Apr-24 00:00 130.68404 22.60356 1.46697631524758 21.607 5.577 93.5396 /T 46.8/ 15.7880 2023-Apr-26 00:00 131.51794 22.33096 1.49621224527001 21.656 5.585 92.4112 /T 23.1/ 32.4640 2023-Apr-28 00:00 132.35491 22.05481 1.52550489699722 21.705 5.592 91.2904 /T 1.132/ 51.1880 2023-Apr-30 00:00 133.19452 21.77515 1.55484322790278 21.752 5.599 90.1767 /T 22.9/ 69.6574 2023-May-02 00:00 134.03636 21.49202 1.58421701122306 21.798 5.605 89.0697 /T 46.3/ 85.6510 2023-May-04 00:00 134.88013 21.20546 1.61361686613336 21.844 5.611 87.9692 /T 70.8/ 96.6280 2023-May-06 00:00 135.72555 20.91551 1.64303430533449 21.887 5.617 86.8745 /T 96.6/ 99.9016 2023-May-08 00:00 136.57241 20.62224 1.67246158376263 21.930 5.622 85.7854 /T 123.4/ 93.6768 2023-May-10 00:00 137.42048 20.32569 1.70189116338794 21.972 5.627 84.7015 /T 150.8/ 78.3834 2023-May-12 00:00 138.26957 20.02591 1.73131490559121 22.013 5.632 83.6225 /T 177.8/ 57.0530

Setups



Due to the diameter and rotation period, we expect a bandwidth for the primary 
of about 22 Hz on Sep 24 and increasing to 33 Hz by Oct. 23 as the subradar latitude
moves toward the equator.
The bandwidth for Dimorphos should be about 1 Hz but will be variable due to the changing subradar
latitude, an elongated shape, and orientation differences Dimorphos revolves 
around Didymos.

CW setup 
TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hopping
Bandwidth:               5000 Hz 
TXoffset                 +500 Hz
FFT                      5000 for 1 Hz resolution 

Possible Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
ncoh              1 
bandwidth       787 Hz   
FFT              64
resolution       12.3 Hz
TXOFF          +100 Hz  
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
ncoh              1 
bandwidth       716 Hz   
FFT              64
resolution       11.2 Hz
TXOFF          +100 Hz  
-------------------------------------------------------------------------
1-usec 
baud            1 usec
code            255
ncoh             16
bandwidth       245 Hz   
FFT             512
resolution        0.48 Hz
TXOFF           +50 Hz 
---------------------------------------------------------------------
1/2-usec
baud            0.5 usec
code            255
ncoh             16
bandwidth       245 Hz
FFT             512
resolution        0.96 Hz
TXOFF           +50 Hz
---------------------------------------------------------------------


Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/a65803/raw/

POINTING:

  OSOD and predicts will be on aardvark:

...not available yet...


POINTING  
                                                          TX Offsets    
Date (UTC)   DOY  hhmmss    RA        Dec         Macro   LHA     Dec    RTT    OSOD

... to be added ...

Transmit offsets are given in millidegrees.  


PRDX.OUT.14f-14-14.?? TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL

Didymos GOLDSTONE MASTERLOG

============================================================================== Receive TX Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes ------------------------------------------------------------------------------
Dr. Lance A. M. Benner | PHONE: (818) 354-7412 Mail Stop 183-601 | FAX: (818) 393-4445 Jet Propulsion Laboratory | email: lance.benner@jpl.nasa.gov California Institute of Technology | Plan: To live long and prosper Pasadena, CA 91109-8099 http://echo.jpl.nasa.gov/asteroids/Didymos/Didymos.2022.planning.html

Asteroid Radar Astronomy
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