Goldstone Radar Observations Planning: 2023 DZ2
2023 DZ2
2023 DZ2 was discovered on February 27, 2023 at the Isaac Newton Telescope
at Observatorio de Roque de los Muchachos on La Palma, Canary Islands, Spain.
This asteroid has an absolute magnitude of 24.1, suggesting a diameter in the realm of
50 meters. P. Pravec, T. Lister, et al. report a rotation period of 0.105 h
from photometry obtained on March 21-22, with a lightcurve amplitude of 0.57 mag
that probably indicates an elongated shape. C. Thomas and V. Reddy reported spectroscopy
obtained with NASA's Infrared Telescope Facility that indicate an X spectral
class (E or M; P is ruled out by lack of thermal excess). This excludes the SQ and V classes.
2023 DZ2 will approach within 0.00117 au (0.45 lunar distances) on March 25.
This will be the largest asteroid to approach this closely since 2019.
This asteroid will also closely approach Earth in 2026. Shortly after its
discovery was announced, the probability of impact in 2026 reached
0.2%, but subsequently new astrometry caused the probability to plummet
by many orders of magnitude so that it is now vanishingly small.
This asteroid will be a very strong radar target at Goldstone with signal-to-noise
ratios suitable for detailed delay-Doppler imaaging. Time is scheduled on March 25
shortly before the close appraoch and on March 27 when the asteroid will be moving away.
Because of the very short round-trip light travel times,
most of the observations on March 25 will be bistatic with transmission at DSS-14
and reception at DSS-13.
Radar observations are also scheduled in Australia using 34 m DSN antennas
to transmit and the Australia Telescope Compact Array. Other antennas in Australia
and Japan may also receive transmissions from Canberra and Goldstone.
Due to the rapid rotation period and elongated shape, we are expecting echo bandwidths
of ~50 Hz that vary substantially as the asteroid rotates.
2023 DZ2 is also the target of a coordinated observing campaign under the auspices
of the International Asteroid Warning Newtwork (IAWN). The asteroid will be at
favorable visual magnitudes and solar elongations for photometry and vis-IR
spectroscopy for a few days prior to the flyby. After the flyby, the asteroid will be
only ~75 deg from the Sun and more challenging to observe at optical wavelengths.
The asteroid will reach about 10th magnitude for a few hours around
closest approach, when it should be visible in small telescopes for experienced observers.
Orbital and Physical Characteristics
Name 2023 DZ2
Number Not numbered
Discoverer Isaac Newton Telescope, La Palma, Canary Islands
Discovery date 2023 Feb 27
Orbit type Apollo
Close approach distance 0.00117 au
Close approach date 2023 Mar 25 19:51 UT
semimajor axis 2.157 au
eccentricity 0.539
inclination 0.081 deg
Orbital period 3.17 y
perihelion distance 0.994 au
aphelion distance 3.320 au
MOID 7.7E-5 au
These elements correspond to the orbit prior to the 2023 flyby. There will
be modest changes after the March 25 close approach that will reduce
the semimajor axis and orbital period.
absolute magnitude (H) 24.1
diameter ~0.05 km +- a factor of two
optical albedo unknown
rotation period 0.105 h (6.274 minutes)
lightcurve amplitude 0.57 mag
spectral class X (E or M)
Last update: 2023 March 28
Goldstone Radar Observations of Asteroid 2023 DZ2
Collage of echo power spectra obtained on March 25 using DSS-14 to transmit
and DSS-13 to receive. Each panel shows ten seconds of data at 1 Hz resolution.
Animation of selected images obtained on March 25. DSS-14 was used
to transmit and DSS-13 was used to receive. Each frame is
an integration of 10 seconds that shows about 10 degrees of rotation.
Resolution is 3.75 m x 1.0 Hz.
Several features are visible: at some orientations the shape looks somewhat triangular;
at others it looks rounded; there's a flat area, and a small-scale topographic feature that
appears on the leading edge. Another small feature is visible along the trailing
edge in some frames. This animation spans multiple rotations.
Tracking of various features confirms the 0.1 h rotation period.
Images from March 25 at a resolution of 3.75 m x 1.0 Hz. Time increases
down and then to the right. Transmissions were at
DSS-14 and reception was at DSS-13. Each panel is an integration of 10 seconds
that shows about 10 degrees of rotation. The images show slightly more
than one rotation so that the last four panels are very similar to the first four.
These images were obtained between 09:44:12-09:51:02 UT.
Echo power spectrum obtained on March 27. This shows a
weighted sum of 59 runs at 1 Hz resolution. The circular polarization
ratio is 0.46+-0.03 and the bandwidth is 20 Hz. The data span 3.1 rotations.
Discovery M.P.E.C.
2023 DZ2
https://www.minorplanetcenter.net/mpec/K23/K23F12.html
SNR Calculations
2023 DZ2
GOLDSTONE SNRs
2023 DZ2 assumptions: D = 0.05 km, P = 0.105 h, OC albedo = 0.1
JPL/Horizons solution 8
DOY start date window RA, dec dist runs SNR/day SNR/run DSS14>DSS13
79-80 2023 Mar 20-21 22:42-09:12 121, +20 0.020 938 35 1 SNR/RTT
80-81 2023 Mar 21-22 22:42-09:11 122, +20 0.016 1190 92 3
81-82 2023 Mar 22-23 22:44-09:13 123, +19 0.012 1627 320 9 Goldstone
82-83 2023 Mar 23-24 22:55-09:23 127, +18 0.007 2573 2100 45 9 Schedule
83-84 2023 Mar 24-25 23:39-10:24 141, +13 0.003 6151 81000 1100 180 0245-1025 Mar 25
85 2023 Mar 26 11:35-17:02 281, -24 0.004 2608 22200 450 75
86 2023 Mar 27 12:09-17:50 293, -22 0.008 1284 940 28 5 1210-1350
87 2023 Mar 28 12:14-18:02 296, -21 0.012 853 170 6
88 2023 Mar 29 12:14-18:07 297, -21 0.017 639 51 2
89 2023 Mar 30 12:13-18:07 298, -21 0.021 511 20 1
Note the use of the actual period and a smaller diameter.
Estimates of the absolute magnitude have shrunk from 23.5 to 24.1 since the discovery
was announced.
Track Assignments
Goldstone tracks:
UT Transmit UT PDT Duration Round-trip Monostatic
DOY Date Telescope TX Window TX Window hh:mm time (sec) SNR/RTT
83 Mar 24 DSS-35 1145-1455 0445-0755 Mar 24 3:10 5.9-5.4 rx with ATCA
84 Mar 25 DSS-14 0245-1025 1945-0325 Mar 24-25 7:45 3.3-2.0 1100 DSS-14 & DSS-13 rx
84 Mar 25 DSS-34 1140-1450 0440-0750 Mar 25 3:10 1.8-1.4 rx with ATCA et al.
86 Mar 27 DSS-14 1210-1350 0510-0650 Mar 27 1:40 7.4-7.7 28 DSS-14 monostatic
SNRs during the track on March 25 will increase by a factor of about seven from start to
finish as the RTT decreases.
Due to the rapid rotation, the Goldstone observations will cover nearly 75 rotations
by the asteroid. Given that the rotation period is about 6 minutes, the asteroid
will rotate ~1 deg per second.
Additional antennas may eavesdrop on DSS-43 and DSS-14 transmissions on March 25,
possibly including:
Hitach 32 m in Japan
Ceduna 30 m in Tasmania
Hobart 12 m
Katherine 12 m
Uncertainties
2023 DZ2
JPL/Horizons solution 11, # obs: 413 (68 days)
2023 Mar 24
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09101 19.92836 0.02528818366006 0.115 64.16 0.003655
2023-Mar-21 00:00 *m 120.63286 19.77585 0.02097036641385 0.140 64.11 0.003021
2023-Mar-22 00:00 *m 121.48709 19.53507 0.01665266916730 0.185 64.01 0.002390
2023-Mar-23 00:00 *m 122.97119 19.10929 0.01233715839324 0.264 63.78 0.001769
2023-Mar-24 00:00 *m 126.07136 18.17879 0.00803172937330 0.662 63.12 0.001170
2023-Mar-25 00:00 *m 136.05516 14.78819 0.00378676437847 5.341 59.26 0.000649
2023-Mar-26 00:00 *m 238.79680 -23.90032 0.00143778261484 64.764 128.87 0.000327
2023-Mar-27 00:00 *m 287.52812 -22.81979 0.00530066085613 9.621 62.05 0.000959
2023-Mar-28 00:00 *m 293.93477 -21.48352 0.00958233261742 7.250 63.05 0.001550
2023-Mar-29 00:00 *m 296.34924 -20.90967 0.01389336297863 6.927 63.36 0.002167
Solution 11 at hourly intervals:
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-25 02:00 *m 137.78458 14.14117 0.00342906656895 6.755 58.25 0.000614
2023-Mar-25 03:00 Am 138.73900 13.74882 0.00325378959918 7.629 57.64 0.000597
2023-Mar-25 04:00 m 139.77576 13.29869 0.00308150855550 8.649 56.92 0.000581
2023-Mar-25 05:00 m 140.91759 12.78044 0.00291258839509 9.847 56.10 0.000565
2023-Mar-25 06:00 142.19243 12.18228 0.00274732000528 11.268 55.16 0.000549
2023-Mar-25 07:00 143.63392 11.49064 0.00258593745958 12.966 54.10 0.000534
2023-Mar-25 08:00 145.28202 10.68955 0.00242864967039 15.012 52.96 0.000519
2023-Mar-25 09:00 147.18377 9.76002 0.00227568740127 17.494 51.83 0.000503
2023-Mar-25 10:00 149.39420 8.67912 0.00212736633927 20.522 50.96 0.000488
2023-Mar-25 11:00 151.97754 7.41910 0.00198416674133 24.229 50.86 0.000470
JPL/Horizons solution 10, # obs: 346 (68 days)
2023 Mar 23
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09101 19.92836 0.02528828716367 0.121 64.72 0.003718
2023-Mar-21 00:00 *m 120.63286 19.77585 0.02097046666760 0.149 64.68 0.003107
2023-Mar-22 00:00 *m 121.48709 19.53507 0.01665276618973 0.209 64.57 0.002515
2023-Mar-23 00:00 *m 122.97118 19.10929 0.01233725220755 0.466 64.34 0.001958
2023-Mar-24 00:00 *m 126.07132 18.17881 0.00803181993938 1.863 63.67 0.001476
2023-Mar-25 00:00 *m 136.05487 14.78831 0.00378685019679 14.021 59.45 0.001145 *
2023-Mar-26 00:00 *m 238.79341 -23.89978 0.00143774393038 150.517 282.71 0.000599
2023-Mar-27 00:00 *m 287.52773 -22.81985 0.00530058433183 17.545 63.70 0.001424 *
2023-Mar-28 00:00 *m 293.93459 -21.48355 0.00958225720749 9.692 63.79 0.001929
2023-Mar-29 00:00 *m 296.34912 -20.90970 0.01389329035022 8.121 63.98 0.002490
Solution 10 uncertainties at DSS-14 at hourly intervals during the track on March 25:
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-25 02:00 *m 137.78422 14.14133 0.00342915160130 17.520 58.49 0.001124
2023-Mar-25 03:00 Am 138.73860 13.74899 0.00325387417473 19.666 57.96 0.001114
2023-Mar-25 04:00 m 139.77532 13.29888 0.00308159261497 22.157 57.43 0.001104
2023-Mar-25 05:00 m 140.91710 12.78066 0.00291267186092 25.072 56.96 0.001093
2023-Mar-25 06:00 142.19187 12.18254 0.00274740277531 28.516 56.68 0.001081
2023-Mar-25 07:00 143.63328 11.49094 0.00258601939866 32.619 56.85 0.001068
2023-Mar-25 08:00 145.28130 10.68990 0.00242873059932 37.549 57.92 0.001053
2023-Mar-25 09:00 147.18293 9.76043 0.00227576708190 43.514 60.64 0.001036
2023-Mar-25 10:00 149.39324 8.67960 0.00212744445465 50.770 66.19 0.001015
2023-Mar-25 11:00 151.97641 7.41967 0.00198424286922 59.629 76.08 0.000989
Relative to solution 8, pointing uncertainties decreased by about a factor of three and
time delay uncertainties dropped by more than a factor of two.
JPL/Horizons solution 8, # obs: 246 (67 days)
2023 Mar 22
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09101 19.92836 0.02528896637035 0.129 65.12 0.004566
2023-Mar-21 00:00 *m 120.63286 19.77586 0.02097114351018 0.192 65.07 0.004064
2023-Mar-22 00:00 *m 121.48706 19.53508 0.01665344073587 0.453 64.97 0.003610
2023-Mar-23 00:00 *m 122.97108 19.10932 0.01233792447541 1.406 64.74 0.003224
2023-Mar-24 00:00 *m 126.07095 18.17893 0.00803248919420 5.370 64.08 0.002932
2023-Mar-25 00:00 *m 136.05248 14.78921 0.00378750291482 36.395 63.00 0.002710 *
2023-Mar-26 00:00 *m 238.76702 -23.89597 0.00143742375395 362.934 663.51 0.001337
2023-Mar-27 00:00 *m 287.52494 -22.82036 0.00529995238887 39.610 65.56 0.002751 *
2023-Mar-28 00:00 *m 293.93336 -21.48383 0.00958161224990 18.737 64.16 0.003073
2023-Mar-29 00:00 *m 296.34829 -20.90990 0.01389264457662 13.619 64.35 0.003450
Solution 8 uncertainties at hourly intervals during the track on March 25:
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-25 02:00 *m 137.78128 14.14246 0.00342979963483 45.124 64.00 0.002685
2023-Mar-25 03:00 Am 138.73532 13.75027 0.00325451934001 50.458 65.12 0.002670
2023-Mar-25 04:00 m 139.77166 13.30034 0.00308223442513 56.633 67.02 0.002654
2023-Mar-25 05:00 m 140.91299 12.78233 0.00291330968056 63.845 70.16 0.002635
2023-Mar-25 06:00 142.18724 12.18447 0.00274803576957 72.347 75.22 0.002614
2023-Mar-25 07:00 143.62804 11.49318 0.00258664646627 82.459 83.17 0.002587
2023-Mar-25 08:00 145.27533 10.69253 0.00242935028389 94.585 95.26 0.002556
2023-Mar-25 09:00 147.17609 9.76352 0.00227637745383 109.231 113.10 0.002516
2023-Mar-25 10:00 149.38535 8.68326 0.00212804295353 127.019 138.65 0.002467
2023-Mar-25 11:00 151.96724 7.42403 0.00198482609478 148.692 174.36 0.002404
JPL/Horizons solution 6, # obs: 142 (65 days)
2023 Mar 20
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09097 19.92837 0.02529190634219 0.933 148.89 0.023765
2023-Mar-21 00:00 *m 120.63278 19.77589 0.02097388762468 2.003 148.69 0.022369
2023-Mar-22 00:00 *m 121.48690 19.53514 0.01665598916590 4.606 148.37 0.020988
2023-Mar-23 00:00 *m 122.97068 19.10947 0.01234027726779 11.825 148.11 0.019622
2023-Mar-24 00:00 *m 126.06970 18.17937 0.00803464429063 38.132 151.16 0.018256
2023-Mar-25 00:00 *m 136.04544 14.79192 0.00378942284335 228.050 252.95 0.016585
2023-Mar-26 00:00 *m 238.69616 -23.88548 0.00143658253902 2093.209 3738.18 0.007475
2023-Mar-27 00:00 *m 287.51752 -22.82165 0.00529845377567 222.429 76.83 0.013738
2023-Mar-28 00:00 *m 293.92995 -21.48456 0.00958026801331 103.041 129.46 0.012888
2023-Mar-29 00:00 *m 296.34588 -20.91045 0.01389148748109 72.504 140.75 0.011812
The impact probability in 2026 is now vanishingly small.
JPL/Horizons solution 5, # obs: 122 (64 days)
2023 Mar 19
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09096 19.92838 0.02529264784448 1.344 206.02 0.033649
2023-Mar-21 00:00 *m 120.63276 19.77589 0.02097458570436 2.884 205.75 0.031656
2023-Mar-22 00:00 *m 121.48685 19.53516 0.01665664386552 6.597 205.30 0.029674
2023-Mar-23 00:00 *m 122.97057 19.10950 0.01234088859011 16.821 204.99 0.027704
2023-Mar-24 00:00 *m 126.06937 18.17948 0.00803521165443 53.885 209.77 0.025722
2023-Mar-25 00:00 *m 136.04354 14.79264 0.00378993601588 320.378 358.47 0.023296
2023-Mar-26 00:00 *m 238.67690 -23.88266 0.00143635240492 2929.233 5225.36 0.010439
2023-Mar-27 00:00 *m 287.51552 -22.82201 0.00529803574995 310.944 87.64 0.019082
2023-Mar-28 00:00 *m 293.92904 -21.48476 0.00957988222051 144.187 176.93 0.017733
2023-Mar-29 00:00 *m 296.34525 -20.91060 0.01389114277856 101.555 194.04 0.016027
The impact probability has dropped to 1/70,000 and Torino Scale 0.
JPL/Horizons solution 3, # obs: 56 (18 days)
2023 Mar 17
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.09177 19.92804 0.02525420021116 8.745 2555.67 0.152718
2023-Mar-21 00:00 *m 120.63474 19.77515 0.02093192848862 21.139 2554.26 0.149360
2023-Mar-22 00:00 *m 121.49169 19.53348 0.01660978248084 51.825 2550.68 0.150316
2023-Mar-23 00:00 *m 122.98336 19.10526 0.01228984614360 137.769 2538.84 0.155448
2023-Mar-24 00:00 *m 126.11099 18.16559 0.00798012138304 454.281 2474.77 0.164008
2023-Mar-25 00:00 *m 136.28801 14.69979 0.00373235906775 2785.259 1885.81 0.170984
2023-Mar-26 00:00 *m 241.07942 -24.21494 0.00147011701655 23439.645 42846.23 0.105538
2023-Mar-27 00:00 *m 287.74211 -22.78122 0.00536339329981 2257.896 3232.67 0.201204
2023-Mar-28 00:00 *m 294.01667 -21.46547 0.00965066975446 896.613 2649.94 0.223261
2023-Mar-29 00:00 *m 296.39766 -20.89826 0.01396636075925 556.160 2572.79 0.243681
JPL/horizons solution 1, # obs: 31 (2 days)
2023 Mar 16 (astrometry on Feb. 27-Mar 1)
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2023-Mar-20 00:00 * 120.06128 19.93013 0.02516127861333 731.114 42143.84 5.817124
2023-Mar-21 00:00 *m 120.60275 19.77571 0.02077606601973 704.762 42117.45 5.628303
2023-Mar-22 00:00 *m 121.46553 19.52938 0.01639094557659 614.419 42063.10 5.466335
2023-Mar-23 00:00 *m 122.99057 19.08611 0.01200806429659 1986.852 41957.47 5.333534
2023-Mar-24 00:00 *m 126.28561 18.08216 0.00763603746102 10055.487 41814.42 5.226306
2023-Mar-25 00:00 *m 137.97824 13.99280 0.00333725901803 86503.886 69030.99 5.015046
2023-Mar-26 00:00 *m 256.00990 -25.48727 0.00176480389584 460487.830 669634.02 3.554841
2023-Mar-27 00:00 *m 289.41843 -22.48657 0.00587503310933 62998.471 46690.41 4.912815
2023-Mar-28 00:00 *m 294.71930 -21.31479 0.01023383313956 31253.865 41698.04 5.033729
2023-Mar-29 00:00 *m 296.83035 -20.79677 0.01461418131076 22223.589 41684.88 5.118139
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:
2023 DZ2
Solution 3
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu%
2023-Mar-16 00:00 119.14611 20.21934 0.04256189727503 18.926 n.a. 122.0645 /T 159.2/ 39.8845
2023-Mar-17 00:00 119.25780 20.18344 0.03824185774061 18.719 n.a. 121.1779 /T 171.8/ 28.9310
2023-Mar-18 00:00 119.42417 20.13382 0.03392149977244 18.483 n.a. 120.3448 /T 169.9/ 18.9225
2023-Mar-19 00:00 119.66622 20.06485 0.02960061942537 18.211 n.a. 119.5858 /T 156.5/ 10.5327
2023-Mar-20 00:00 120.01929 19.96687 0.02527909994264 17.888 n.a. 118.9354 /T 142.3/ 4.3627
2023-Mar-21 00:00 120.54779 19.82195 0.02095700498680 17.497 n.a. 118.4568 /T 128.2/ 0.8428
2023-Mar-22 00:00 121.38247 19.59271 0.01663485716506 17.003 n.a. 118.2788 /T 114.5/ 0.1564
2023-Mar-23 00:00 122.83543 19.18652 0.01231455497795 16.340 n.a. 118.7103 /T 101.7/ 2.2173
2023-Mar-24 00:00 125.87980 18.29597 0.00800349308020 15.348 n.a. 120.7249 /T 90.8/ 6.7115
2023-Mar-25 00:00 135.76765 15.01858 0.00374976863510 13.447 n.a. 129.7163 /T 87.3/ 13.1812
2023-Mar-26 00:00 240.94087 -23.88570 0.00142847237612 11.589 n.a. 121.4276 /L 176.0/ 21.1168
2023-Mar-27 00:00 288.00512 -22.64754 0.00532954080974 15.978 n.a. 79.4864 /L 145.7/ 30.0284
2023-Mar-28 00:00 294.17611 -21.38204 0.00961913283139 17.495 n.a. 74.6339 /L 152.0/ 39.4837
2023-Mar-29 00:00 296.50989 -20.83850 0.01393552591737 18.352 n.a. 73.3858 /L 161.5/ 49.1176
2023-Mar-30 00:00 297.74206 -20.53821 0.01825662101046 18.935 n.a. 73.1868 /L 171.1/ 58.6221
2023-Mar-31 00:00 298.51148 -20.34687 0.02257716362958 19.368 n.a. 73.4311 /L 172.9/ 67.7283
Setups
CW setup
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: no hopping
Bandwidth: 5000 Hz
TXoffset +500 Hz
FFT 1000 for 0.5 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
---------------------------------------------------------------------
1/8 usec
baud 0.125 usec
code 127
ncoh 250
bandwidth 262 Hz
FFT 256
resolution 0.98 Hz
TXOFF +50 Hz
---------------------------------------------------------------------
Chirp setups from previous targets:
Chirp at 20 MHz, sample clock at 40 MHz, prp=25 us, offset = +15 Hz
downsample PRP resolution range bin count FFT ncoh delta_f
4 25 usec 0.05 usec 500 500 720 0.111 Hz
Bandwidth = 80 Hz
Chirp at 40 MHz, sample clock at 80 MHz, prp=25 us, transmit offset +10 Hz (Echo in column 530)
downsample PRP resolution range bin count FFT ncoh delta_f
4 25 usec 0.025 usec 1000 1000 120 0.333 Hz
Bandwidth = 333.3 Hz
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/2023dz2/raw/
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
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Receive TX
Setup hops dwell code ncoh FFT runs start -stop OSOD offset Poln Notes
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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
https://echo.jpl.nasa.gov/asteroids/2023DZ2/2023DZ2.2023.goldstone.planning.html
Asteroid Radar Astronomy