Goldstone Radar Observations Planning: (163899) 2003 SD220, 4660 Nereus, and 2008 UZ94
(163899) 2003 SD220
2003 SD220 was discovered by LONEOS on September 29, 2003, and subsequently linked with 2000 AD229,
which was also discovered by LONEOS on 2000 January 6. Although this object has two provisional designations,
it is currently known as 2003 SD220.
2003 SD220 has an extremely slow rotation period of roughly 12 days, and lightcurves suggest
non-principal axis rotation (Warner 2016, Carbognani and Buzzi 2016). Radar images at Goldstone
and Arecibo in 2015 and 2018 revealed a
highly-elongated and very-slowly rotating object that is consistent with expectations
from the lightcurves. The 2015 radar images provided a small number of snapshots that did
not cover much rotation so a significant fraction of the surface has not yet been seen.
Nugent et al. (2016) estimated a diameter of 0.8 +- 0.02 km and
an optical albedo of 0.3 +- 0.04 from thermal IR observations by the NEOWISE spacecraft.
Vis-IR observations by Perna et al. (2016) place 2003 SD220 in the Sr spectral class.
2003 SD220 will approach within 0.036 au on 2021 December 17 when it will be one of the strongest
radar targets of the year, with signal-to-noise ratios per run at Goldstone strong enough for
high-resolution delay-Doppler imaging. An extensive campaign is scheduled at Goldstone starting
on November 22 and spanning several weeks.
2003 SD220 has an orbital period of 0.754 years and is currently close to a 4:3 mean motion
resonance with Earth; flybys within 0.1 au began in 2015 and will occur at three year
intervals until 2024. The repeated opportunities to obtain
ranging measurements may lead to detection of the Yarkovsky effect for this object.
This asteroid also approaches within 0.1 au of Venus relatively often.
The Minor Planet Center has classified 2003 SD220 as a "Potentially Hazardous Asteroid."
This asteroid is on NASA's NHATS list of potential spacecraft mission targets, although
no actual mission is planned to visit this asteroid.
(4660) Nereus
Nereus was discovered in February, 1982 by E. F. Helin using the 18" Schmidt telescope at Palomar.
Some of its physical properties were studied during the most recent close approach in 2002.
This object is elongated with an effective
diameter of 330 meters, has a rotation period of 15 hours, and is a member of the optically-bright
E spectral class.
Goldstone and Arecibo radar images in 2002 revealed that Nereus is somewhat angular and that
it has a high circular polarization ratio of about 0.7 (Brozovic et al. 2009). This object is
elongated with an effective diameter of 330 meters, has a rotation period of 15 hours, and is a
member of the optically-bright E spectral class.
In 2021 Nereus will approach within 0.0263 au on Dec. 11 and it will be a strong radar target for several
weeks. We expect to obtain delay-Doppler images with resolutions several times finer than the
most detailed images obtained in 2002. Consequently, it is likely that surface
features will be visible that we did not see in 2002. Goldstone observations are scheduled starting
on December 5 and will last about two weeks.
Due to the long arc of optical and radar observations, a radar ranging detection in 2021 may show
the acceleration of the Yarkovsky effect and facilitate estimation of the mass and bulk density.
Nereus has been considered as a possible spacecraft target for many years so the 2021 encounter
provides an important opporunity to learn more about this important asteroid.
Nereus makes close approaches to both Earth and Mars several times each century. The 2021 flyby
will be the closest with Earth until 2060 when Nereus will approach within 0.008 au.
(518678) 2008 UZ94
2008 UZ94 was discovered in October 2008 by LINEAR. Its absolute magnitude of 17.4 suggests
a diameter of about 1 km but otherwise nothing is known about its physical properties.
This asteroid will approach within 0.059 au on December 5 when it will be a moderately
strong radar target suitable for CW observations, ranging, and perhaps coarse-resolution
imaging. Observations are scheduled at Goldstone on December 1.
UZ94 will brighten to about 15th magnitude a few days after the closest approach, although
the solar elongations will be only ~70-90 degrees.
NASA's NEOWISE spacecraft observed this asteroid in September, 2021. J. Masiero reports
a preliminary diameter of 960+-300 m estimated from NEOWISE data.
UPDATE: Goldstone observations revealed that 2008 UZ94 is a binary system.
Orbital and Physical Characteristics
Name 2003 SD220 Nereus (1982 DB) 2008 UZ94
Number 163899 4660 518678
Discoverer LONEOS. E. F. Helin LINEAR
Discovery date 2003 September 29 1982 February 28 2008 Oct 28
orbit type Aten Apollo Apollo
Close approach dist. 0.036 au 0.0263 au 0.0593 au
Close approach dist. 14.1 lunar distances 10.2 lunar distances 23.1 lunar distances
Close approach date 2021 December 17 2021 Dec 11 2021 Dec 5
semimajor axis 0.828 au 1.489 au 2.191 au
eccentricity 0.210 0.360 0.572
inclination 8.5 deg 1.4 deg 30.2
Orbital period 0.754 years 1.82 years 3.24 y
perihelion distance 0.655 au 0.953 au 0.938 au
aphelion distance 1.002 au 2.025 au 3.444 au
MOID 0.0192 au 0.00325 au 0.024 au
absolute magnitude (H) 17.3 18.3 17.4
diameter 0.8 +- 0.02 km 0.33 km 0.96+-0.3 km (J. Masiero, pers. comm.)
optical albedo 0.3 +- 0.04 0.54 ~0.2 (J. Masiero, pers. comm.)
rotation period ~287 h 15.16 h unknown
lightcurve amplitude ~0.7 mag 0.6 mag unknown
spectral class Sr Xe unknown
PHA, NHATS PHA, NHATS PHA
Binary
Last update: 2022 January 4
Goldstone Radar Echoes from Asteroid 2003 SD220
Echo power spectrum from 2003 SD220 obtained on November 22.
2003 SD220 image obtained on Nov. 22. Range increases down and Doppler frequency
increases to the right. Resolution = 18.75 m x 0.015 Hz. The visible extent is
about 20 rows or about 375 meters. Weighted sum of 78 runs.
2003 SD220 delay-Doppler image obtained on Dec. 7. Resolution = 7.5 m x 0.022 Hz.
The visible extent is about 450 meters. This image is a weighted sum of 15 runs.
Delay-Doppler image obtained on Dec. 9. Resolution = 7.5 m x 0.02 Hz.
The visible extent is more than 800 meters. This image is a weighted sum
of 6 runs.
Collage from Dec. 27. Time increases from left to right and then down.
Resolution = 7.5 m x 0.023 Hz.
Image from Dec. 29. The visible extent is about 2.5 km. The image
was stretched by a factor of four in the Doppler dimension.
Goldstone Radar Echoes from Nereus
Echo power spectrum obtained from Nereus on 2021 November 22. Resolution = 0.5 Hz.
Delay-Doppler images of Nereus obtained on 2021 November 30. In each image, time delay
increases down and Doppler frequency increases to the right, so rotation is counterclockwise.
Resolution = 37.5 m x 0.2 Hz. The first four frames are weighted sums of 16 runs and the last
is a sum of 6 runs.
Sequence of delay-Doppler images obtained on 2021 December 5. Resolution = 7.5 m x 0.1 Hz.
Time increases from left to right and top to bottom.
Sequence of delay-Doppler images obtained on December 7. Resolution = 7.5 m x 0.08 Hz.
Each panel shows a weighted sum of 10 runs. Time increases from left to right and top to bottom.
The SNRs decrease substantially partway through the track when the system temperatures increased
by a factor of about four due to passing bands of rain. The images show about 140 degrees of rotation.
Images from December 9. Resolution = 3.75 m x 0.04 Hz. Each panel is a weighted sum of 10 runs.
Subtle features are evident including linear regions with radar-dark pixels, which appear to be
radar shadows, and a small-scale topographic high along the leading edge. The latter feature may
be a boulder. Another small region of radar-bright pixels appears persistently behind the leading
edge and may represent another boulder. These are the highest resolution images of Nereus obtained to date.
Images from December 10. Resolution = 3.75 m x 0.04 Hz. Each panel is a weighted sum of 10 runs.
Images from December 12. Resolution = 3.75 m x 0.04 Hz. Each panel is a weighted sum of 10 runs.
Each panel covers approximately the same interval, but there were datataking problems near the end,
so the integrations in the last three panels include fewer runs.
Goldstone Radar Echoes from 2008 UZ94
Echo power spectrum obtained from 2008 UZ94 on 2021 December 1. Resolution = 1 Hz.
The bandwidth is about 20 Hz, and combined with an estimated diameter of 0.96 km, this
suggests a rotation period of (4.8 h)[cos(delta)], where delta is the unknown subradar latitude.
Goldstone delay-Doppler image of 2008 UZ94. Resolution = 75 m x 3.1 Hz. Time delay
increases down and Doppler frequency increases to the right. The image is weighted sum
of 17 runs. The image shows two objects whose separation changes with time.
Discovery M.P.E.C.
2003 SD220
https://minorplanetcenter.net/mpec/K03/K03S91.html
Nereus (1982 DB)
http://www.cbat.eps.harvard.edu/iauc/03600/03675.html
2008 UZ94
https://www.minorplanetcenter.net/mpec/K08/K08U91.html
SNR Calculations
2003 SD220
GOLDSTONE SNRs
2003 SD220: D = 0.7 km, P = 287 h, OC albedo = 0.1
w DOY start date window RA, dec dist runs SNR/day SNR/run
45 314-315 2021 Nov 10-11 08:14-01:20 184, +68 0.116 261 120 9
45 315-316 2021 Nov 11-12 08:10-01:24 185, +68 0.114 269 140 9
45 316-317 2021 Nov 12-13 08:05-01:29 186, +68 0.111 277 150 10
45 317-318 2021 Nov 13-14 08:00-01:35 187, +69 0.109 286 160 11
45 318-319 2021 Nov 14-15 07:55-01:41 188, +69 0.106 296 180 12
46 319-320 2021 Nov 15-16 07:49-01:49 190, +70 0.104 307 200 13
46 320-321 2021 Nov 16-17 07:44-01:58 191, +70 0.101 319 220 14
46 321-322 2021 Nov 17-18 07:38-02:08 192, +71 0.098 332 250 15
46 322-323 2021 Nov 18-19 07:31-02:20 194, +71 0.096 346 280 17
46 323-324 2021 Nov 19-20 07:24-02:34 196, +72 0.093 362 310 18
46 324-325 2021 Nov 20-21 07:17-02:50 197, +72 0.091 380 350 20
46 325-326 2021 Nov 21-22 07:08-03:11 200, +73 0.088 401 400 22
47 326-327 2021 Nov 22-23 06:58-03:36 202, +73 0.085 425 450 25 Scheduled 0700-1230 Nov 22
47 327-328 2021 Nov 23-24 06:45-04:10 205, +74 0.083 454 520 28
47 328-329 2021 Nov 24-25 06:26-05:16 208, +74 0.080 495 600 31
47 329-330 2021 Nov 25-26 05:38-03:47 211, +75 0.077 545 700 35 Thanksgiving. Circumpolar starts
47 330-331 2021 Nov 26-27 07:29-04:23 215, +75 0.075 564 810 39 Thanksgiving evening
47 331-332 2021 Nov 27-28 07:20-05:08 220, +76 0.072 584 930 44
47 332-333 2021 Nov 28-29 07:08-04:52 225, +76 0.069 605 1100 50
48 333-334 2021 Nov 29-30 08:02-05:31 232, +77 0.067 628 1300 57 Scheduled 0805-1345 Nov 29 Speckle
...next two dates are the same...
48 334-335 2021 Nov 30-01 08:09-06:07 239, +77 0.064 653 1500 66 Scheduled 0900-1300 Nov 30
48 334-335 2021 Nov 30-01 08:09-06:07 239, +77 0.064 653 1500 66 Scheduled 0220-0605 Dec 1 w/UZ94
...
48 335-336 2021 Dec 01-02 08:26-06:32 246, +77 0.062 679 1700 76
48 336-337 2021 Dec 02-03 08:59-06:45 255, +77 0.059 707 2000 87
48 337-338 2021 Dec 03-04 09:49-06:49 264, +76 0.057 737 2400 100
48 338-339 2021 Dec 04-05 10:48-06:50 272, +76 0.054 768 2800 120 Scheduled 1105-1325 Dec 4
48 339-340 2021 Dec 05-06 11:49-08:20 281, +74 0.052 763 3300 140 Circumpolar ends
49 340-341 2021 Dec 06-07 11:16-07:50 288, +73 0.050 704 3800 160 Scheduled 0615-0750 Dec 7
49 341-342 2021 Dec 07-08 12:35-07:32 295, +71 0.048 678 4400 190 Scheduled 0630-0730 Dec 8 w/Nereus
49 342-343 2021 Dec 08-09 13:37-07:17 301, +68 0.046 661 5100 220 Scheduled 0610-0715 Dec 9 w/Nereus Speckle
49 343-344 2021 Dec 09-10 14:27-07:05 306, +66 0.044 649 5900 250
49 344-345 2021 Dec 10-11 15:09-06:53 310, +62 0.042 639 6700 290
49 345-346 2021 Dec 11-12 15:45-06:43 314, +59 0.041 630 7600 330
49 346-347 2021 Dec 12-13 16:15-06:32 317, +55 0.039 621 8500 370
50 347-348 2021 Dec 13-14 16:42-06:22 320, +51 0.038 611 9200 400
50 348-349 2021 Dec 14-15 17:06-06:12 323, +46 0.037 600 9900 440
50 349-350 2021 Dec 15-16 17:26-06:01 325, +42 0.037 585 10000 460
50 350-351 2021 Dec 16-17 17:45-05:51 327, +37 0.036 568 10000 480 Scheduled 0130-0550 Dec 17
50 351-352 2021 Dec 17-18 18:02-05:40 328, +32 0.036 547 10000 480
50 352-353 2021 Dec 18-19 18:18-05:29 330, +27 0.036 523 9900 470
50 353-354 2021 Dec 19-20 18:33-05:18 331, +22 0.037 497 9300 450 Scheduled 0215-0515
51 354-355 2021 Dec 20-21 18:46-05:06 332, +17 0.038 469 8500 420
51 355-356 2021 Dec 21-22 18:59-04:55 334, +13 0.039 440 7500 380
51 356-357 2021 Dec 22-23 19:11-04:43 335, +9 0.040 410 6500 350 Scheduled 0240-0440
51 357-358 2021 Dec 23-24 19:22-04:31 335, +5 0.041 380 5500 310
51 358-359 2021 Dec 24-25 19:33-04:19 336, +1 0.043 352 4600 270 Christmas Eve
51 359-360 2021 Dec 25-26 19:43-04:07 337, -2 0.045 324 3800 230 Christmas
51 360-361 2021 Dec 26-27 19:52-03:55 338, -6 0.047 298 3100 200 Scheduled 2335-0350 Speckle
52 361-362 2021 Dec 27-28 20:01-03:43 338, -9 0.049 273 2500 170
52 362-363 2021 Dec 28-29 20:10-03:31 339, -11 0.051 250 2000 140 Scheduled 0130-0320
52 363-364 2021 Dec 29-30 20:18-03:19 339, -14 0.053 228 1600 120
52 364-365 2021 Dec 30-31 20:26-03:06 339, -16 0.056 208 1300 100
52 365- 1 2021 Dec 31-01 20:34-02:54 340, -18 0.058 190 1100 84 New Year's Eve
52 1- 2 2022 Jan 01-02 20:41-02:41 340, -20 0.061 172 860 71 New Year's Day
52 2- 3 2022 Jan 02-03 20:48-02:28 340, -22 0.063 156 690 60
1 3- 4 2022 Jan 03-04 20:55-02:15 341, -23 0.066 141 560 51
1 4- 5 2022 Jan 04-05 21:02-02:02 341, -25 0.069 127 450 43
1 5- 6 2022 Jan 05-06 21:09-01:48 341, -26 0.072 114 370 36
1 6- 7 2022 Jan 06-07 21:16-01:34 341, -28 0.074 101 300 31
1 7- 8 2022 Jan 07-08 21:24-01:20 341, -29 0.077 89 240 27
1 8- 9 2022 Jan 08-09 21:31-01:05 341, -30 0.080 78 190 23
1 9- 10 2022 Jan 09-10 21:40-00:48 341, -31 0.083 67 160 20
2 10- 11 2022 Jan 10-11 21:49-00:31 341, -32 0.086 55 120 17
2 11- 12 2022 Jan 11-12 22:00-00:12 341, -33 0.089 43 96 15
Nereus
Goldstone SNRs
Nereus: D = 0.33 km, P = 15.1 h, OC albedo = 0.4, pole = ( 25, +80)
w DOY start date window RA, dec dist delta runs SNR/day SNR/run
46 322 2021 Nov 18 01:20-13:09 49, +35 0.097 -24 220 69 5
46 323 2021 Nov 19 01:15-13:09 49, +35 0.093 -25 232 83 6
46 324 2021 Nov 20 01:10-13:08 50, +36 0.088 -26 244 100 7
46 325 2021 Nov 21 01:06-13:08 50, +37 0.084 -26 257 120 8
47 326 2021 Nov 22 01:01-13:09 50, +38 0.080 -27 272 150 10 Overlaps 2003 SD220
47 327 2021 Nov 23 00:56-13:10 51, +39 0.076 -28 288 180 12
47 328 2021 Nov 24 00:51-13:11 52, +40 0.073 -28 306 230 14
47 329 2021 Nov 25 00:47-13:14 52, +41 0.069 -29 326 290 17
47 330 2021 Nov 26 00:42-13:17 53, +42 0.065 -30 349 360 21 Thanksgiving
47 331 2021 Nov 27 00:37-13:21 54, +44 0.061 -31 374 460 26 Thanksgiving
47 332 2021 Nov 28 00:33-13:27 55, +45 0.058 -32 403 600 32
48 333 2021 Nov 29 00:28-13:35 56, +47 0.054 -34 436 780 41 Overlaps 2003 SD220
48 334 2021 Nov 30 00:24-13:45 58, +49 0.051 -35 473 1000 52 Overlaps 2003 SD220
48 335 2021 Dec 01 00:20-13:58 60, +51 0.047 -37 517 1400 66 Overlaps 2003 SD220
48 336 2021 Dec 02 00:16-14:16 63, +53 0.044 -38 568 1900 86 Overlaps 2003 SD220
48 337 2021 Dec 03 00:14-14:39 66, +56 0.041 -40 628 2600 110
48 338 2021 Dec 04 00:12-15:11 70, +59 0.038 -42 700 3600 150 Overlaps 2003 SD220
48 339 2021 Dec 05 00:13-15:56 77, +62 0.035 -44 787 5000 190 Scheduled 0655-1245 Speckle
49 340 2021 Dec 06 00:18-16:59 85, +65 0.033 -46 891 6900 250
49 341 2021 Dec 07 00:32-18:24 98, +68 0.031 -47 1012 9500 330 Scheduled 0615-1315
49 342 2021 Dec 08 01:07-19:52 117, +69 0.029 -48 1121 12000 410 Scheduled 0630-1310 w/2003 SD220
49 343 2021 Dec 09 02:22-20:51 138, +69 0.027 -48 1158 15000 500 Scheduled 0610-1130 w/2003 SD220
49 344 2021 Dec 10 04:13-21:17 158, +65 0.027 -47 1112 17000 550 Scheduled 0640-1305 Speckle
49 345 2021 Dec 11 05:57-21:25 172, +60 0.026 -45 1033 17000 560
49 346 2021 Dec 12 07:13-21:26 182, +53 0.027 -41 947 15000 520 Scheduled 0715-1310 Speckle
50 347 2021 Dec 13 08:08-21:23 188, +47 0.027 -37 862 12000 450
50 348 2021 Dec 14 08:48-21:17 193, +40 0.029 -33 779 9600 380 CANCELLED: EQUIPMENT PROBLEMS
50 349 2021 Dec 15 09:18-21:10 197, +34 0.030 -29 701 7300 300 Scheduled 0930-1240 Speckle
50 350 2021 Dec 16 09:41-21:03 200, +29 0.032 -25 630 5400 230
50 351 2021 Dec 17 09:59-20:56 202, +24 0.035 -21 566 4000 180
50 352 2021 Dec 18 10:14-20:49 204, +20 0.037 -18 510 2900 140
50 353 2021 Dec 19 10:26-20:41 205, +17 0.040 -15 461 2200 110
51 354 2021 Dec 20 10:36-20:34 207, +13 0.043 -13 418 1600 85
51 355 2021 Dec 21 10:44-20:27 208, +11 0.046 -11 381 1209 67
51 356 2021 Dec 22 10:51-20:21 209, +8 0.049 -9 349 920 53
51 357 2021 Dec 23 10:57-20:14 210, +6 0.052 -7 320 700 42
51 358 2021 Dec 24 11:01-20:08 210, +4 0.056 -6 296 540 34 Christmas Eve
51 359 2021 Dec 25 11:05-20:02 211, +3 0.059 -4 274 430 28 Christmas
51 360 2021 Dec 26 11:09-19:56 212, +1 0.062 -3 255 340 23
52 361 2021 Dec 27 11:11-19:50 212, 0 0.066 -2 238 270 19
52 362 2021 Dec 28 11:14-19:44 213, -2 0.069 -1 223 220 16
52 363 2021 Dec 29 11:15-19:39 213, -3 0.072 0 209 180 13
52 364 2021 Dec 30 11:17-19:34 214, -4 0.076 +1 197 150 11
52 365 2021 Dec 31 11:18-19:28 214, -5 0.079 +1 186 120 10 New Year's Eve
52 1 2022 Jan 01 11:19-19:23 215, -6 0.083 +2 176 100 8 New Year's day
52 2 2022 Jan 02 11:20-19:18 215, -6 0.086 +3 167 85 7
01 3 2022 Jan 03 11:20-19:13 215, -7 0.090 +3 159 72 6
01 4 2022 Jan 04 11:20-19:08 216, -8 0.093 +4 151 61 5
01 5 2022 Jan 05 11:20-19:03 216, -8 0.096 +4 144 53 5
SNRs above use the total power radar albedo because SC/OC = 0.75.
2008 UZ94
2008 UZ94: D = 1 km, P = 2.2 h, OC albedo = 0.1
w DOY start date window RA, dec dist runs SNR/day SNR/run
47 331-332 2021 Nov 27 17:48-04:11 295, +18 0.102 183 26 2
47 332-333 2021 Nov 28 18:02-04:08 298, +14 0.093 195 38 3
48 333-334 2021 Nov 29 18:21-04:03 301, +10 0.084 207 56 4
48 334-335 2021 Nov 30 18:44-03:57 304, +5 0.076 216 80 6
48 335-336 2021 Dec 01 19:15-03:48 308, -2 0.069 220 110 8 Scheduled on Dec. 1 0220-0348 with SD220
48 336-337 2021 Dec 02 19:57-03:35 313, -10 0.064 213 140 10
48 337-338 2021 Dec 03 20:54-03:14 319, -19 0.061 186 140 12
48 338-339 2021 Dec 04 22:20-02:33 325, -28 0.059 126 110 11
Track Assignments
DOY BOA BOT EOT EOA
Goldstone tracks:
UT UT PST Duration Round-trip
DOY Date Target TX Window TX Window hh:mm time (sec) SNR/run
326 Nov 22 2003 SD220 0700-1230 2300-0430 Nov 21-22 5:30 85 25 LB
326 Nov 22 Nereus 0700-1230 2300-0430 Nov 21-22 5:30 80 10 el > 75 deg 0552-0818
333 Nov 29 2003 SD220 0805-1345 0005-0545 Nov 29 5:40 67 57 SN Speckle: 1325-1345 UT
333 Nov 29 Nereus 0805-1335 0005-0535 Nov 29 5:30 54 41
334 Nov 30 2003 SD220 0900-1300 0100-0500 Nov 30 4:00 64 66 MB
334 Nov 30 Nereus 0900-1300 0100-0500 Nov 30 4:00 51 52
336 Dec 1 2008 UZ94 0220-0345 1820-1945 Nov 30 1:25 69 8 SN
335 Dec 1 2003 SD220 0220-0605 1820-2205 Nov 30 3:45 64 66
335 Dec 1 Nereus 0220-0605 1820-2205 Nov 30 3:45 47 66
338 Dec 4 2003 SD220 1105-1325 0305-0525 Dec 4 2:20 54 120 LB * Quasar
338 Dec 4 Nereus 1105-1325 0305-0525 Dec 4 2:20 38 150
339 Dec 5 Nereus 0655-1245 2255-0445 Dec 4- 5 5:50 35 190 LB Speckle: 0810-0830
341 Dec 7 2003 SD220 0615-0750 2215-2350 Dec 6 1:40 50 160 LB
341 Dec 7 Nereus 0615-1315 2215-0515 Dec 6- 7 7:00 31 330
341 Dec 7 2003 SD220 1235-1315 0435-0515 Dec 7 0:40 48 190
342 Dec 8 2003 SD220 0630-0730 2230-2330 Dec 7 1:00 48 190 MB * Quasar
342 Dec 8 Nereus 0630-1310 2230-0510 Dec 7- 8 6:40 29 410
343 Dec 9 2003 SD220 0610-0715 2210-2315 Dec 8 1:05 46 220 MB * Speckle: 0655-0715 UT
343 Dec 9 Nereus 0610-1130 2210-0330 Dec 8- 9 5:20 27 500 Quasar
344 Dec 10 Nereus 0640-1305 2240-0505 Dec 9-10 6:25 27 550 SN * Speckle: 1250-1305
Quasar
346 Dec 12 Nereus 0715-1310 2315-0510 Dec 11-12 5:55 27 520 SN Speckle: 1240-1310
348 Dec 14 Nereus 0850-1245 0050-0445 Dec 14 3:55 29 380 LB CANCELLED: EQUIPMENT PROBLEMS
349 Dec 15 Nereus 0930-1240 0130-0440 Dec 15 3:10 30 300 LB Speckle: 1220-1240
349 Dec 15 Nereus 2230-2330 1430-1530 Dec 15 1:00 30 DSS-43
350 Dec 16 2003 SD220 0635-0830 2235-0030 Dec 15-16 1:55 37 DSS-43
351 Dec 17 2003 SD220 0130-0550 1730-2150 Dec 16 4:20 35 480 SN * Quasar
353 Dec 19 2003 SD220 0610-0830 2210-0030 Dec 18-19 2:20 36 DSS-43
354 Dec 20 2003 SD220 0215-0515 1815-2115 Dec 19 3:00 37 450 SN * Quasar
...The next track might not happen due to the launch of JWST...
355 Dec 21 2003 SD220 0215-0505 1815-2105 Dec 20 2:50 38 420 MB * Quasar.
355 Dec 21 2003 SD220 0545-0830 2145-0030 Dec 20-21 2:45 DSS-43
357 Dec 23 2003 SD220 0240 0440 1840-2040 Dec 22 2:00 40 350 MB
...The next two tracks might not happen due to launch of JWST...
360 Dec 26-27 2003 SD220 2335 0350 1535-1950 Dec 26 3:15 47 200 LB Speckle: 0330-0350 UT
363 Dec 29 2003 SD220 0130 0320 1730-1920 Dec 28 1:50 51 140 LB Speckle: 0300-0320 UT
Radar Speckle:
2003 SD220
November 29: 1325 - 1345 UT
December 09: 0655 - 0715 UT
December 27: 0330 - 0350 UT ...Might not happen due to launch of JWST...
December 29: 0300 - 0320 UT ...Might not happen due to launch of JWST...
Nereus
December 05: 0810-0830 UT
December 10: 1250-1305 UT
December 12: 1240-1310 UT
December 15: 1220-1240 UT
High elevation angles with Nereus: Only a problem at the beginning on Nov. 22.
Note that DSS-13 is scheduled on three dates: Dec 17, 20, and 21.
Tracks previously scheduled for Nov 23, Nov 24, Dec 2, Dec 6, Dec 13, and Dec 31 were cancelled.
Uncertainties
2003 SD220
JPL/Horizons solution 138, # obs: 1265 (2000-2021)
2021 Nov 3
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2021-Nov-20 00:00 * 196.03987 71.64982 0.09246262572742 0.370 0.27 0.000034
2021-Nov-22 00:00 * 200.17647 72.73638 0.08720239641532 0.396 0.30 0.000028
2021-Nov-24 00:00 * 205.41534 73.87349 0.08192542554654 0.425 0.34 0.000021
2021-Nov-26 00:00 * 212.20608 75.01906 0.07665566753704 0.457 0.39 0.000014
2021-Nov-28 00:00 * 221.16066 76.08155 0.07142253959700 0.493 0.44 0.000006
2021-Nov-30 00:00 * 232.94962 76.88149 0.06626272118746 0.532 0.50 0.000007
2021-Dec-02 00:00 * 247.82358 77.11211 0.06122252262937 0.575 0.58 0.000017
2021-Dec-04 00:00 *m 264.72798 76.36280 0.05636080065314 0.620 0.66 0.000030
2021-Dec-06 00:00 *m 281.21199 74.26829 0.05175235657254 0.664 0.75 0.000045
2021-Dec-08 00:00 *m 295.13364 70.65341 0.04749196014611 0.702 0.84 0.000061
2021-Dec-10 00:00 *m 305.91602 65.49909 0.04369869720264 0.727 0.92 0.000080
2021-Dec-12 00:00 *m 314.01823 58.85211 0.04051793184622 0.726 0.96 0.000099
2021-Dec-14 00:00 *m 320.11920 50.83144 0.03811481419916 0.689 0.91 0.000119
2021-Dec-16 00:00 *m 324.78227 41.70669 0.03665218990753 0.613 0.76 0.000137
2021-Dec-18 00:00 *m 328.40941 31.94994 0.03625207534238 0.515 0.50 0.000151
2021-Dec-20 00:00 * 331.27550 22.17249 0.03695578003771 0.432 0.20 0.000158
2021-Dec-22 00:00 * 333.56805 12.95281 0.03870902511481 0.400 0.09 0.000160
2021-Dec-24 00:00 * 335.41652 4.67710 0.04138382879954 0.413 0.29 0.000157
2021-Dec-26 00:00 * 336.91181 -2.50311 0.04482015580583 0.440 0.42 0.000151
2021-Dec-28 00:00 * 338.11888 -8.61258 0.04886175257805 0.461 0.49 0.000143
2021-Dec-30 00:00 * 339.08470 -13.76791 0.05337491081162 0.471 0.52 0.000133
2022-Jan-01 00:00 * 339.84317 -18.11469 0.05825327089248 0.471 0.52 0.000124
Nereus
JPL/Horizons solution 164, # obs: 1181 (1981-2021)
2021 Nov 3
Non-gravitational perturbations are included in the orbit fit.
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2021-Nov-20 00:00 * 49.58880 35.81874 0.08975401126661 0.481 0.15 0.000065
2021-Nov-22 00:00 * 50.37939 37.47150 0.08163737807445 0.529 0.16 0.000067
2021-Nov-24 00:00 * 51.41546 39.41915 0.07376214370922 0.586 0.19 0.000069
2021-Nov-26 00:00 * 52.80572 41.74748 0.06614028189125 0.655 0.24 0.000070
2021-Nov-28 00:00 * 54.73004 44.57277 0.05879718132292 0.738 0.32 0.000070
2021-Nov-30 00:00 * 57.50870 48.04970 0.05177920433579 0.841 0.46 0.000070
2021-Dec-02 00:00 * 61.76599 52.36779 0.04516639280617 0.968 0.67 0.000069
2021-Dec-04 00:00 *m 68.85987 57.68818 0.03909357534558 1.122 0.97 0.000068
2021-Dec-06 00:00 *m 82.07690 63.81691 0.03378301199260 1.296 1.38 0.000070
2021-Dec-08 00:00 *m 108.62295 68.86994 0.02958186817132 1.457 1.85 0.000080
2021-Dec-10 00:00 *m 148.13821 67.26450 0.02695698594706 1.526 2.16 0.000101
2021-Dec-12 00:00 *m 176.26825 57.10573 0.02634115223051 1.430 2.03 0.000129
2021-Dec-14 00:00 *m 190.40461 44.04127 0.02783999566442 1.202 1.55 0.000154
2021-Dec-16 00:00 *m 198.00984 32.14569 0.03113247785837 0.958 1.06 0.000171
2021-Dec-18 00:00 *m 202.63925 22.63825 0.03571518916428 0.764 0.72 0.000180
2021-Dec-20 00:00 * 205.75218 15.35585 0.04115136769440 0.621 0.52 0.000186
2021-Dec-22 00:00 * 208.01179 9.78655 0.04713912590529 0.517 0.39 0.000189
2021-Dec-24 00:00 * 209.75400 5.46178 0.05348490658320 0.438 0.31 0.000192
2021-Dec-26 00:00 * 211.16442 2.03313 0.06006480622717 0.376 0.25 0.000194
2021-Dec-28 00:00 * 212.35264 -0.74347 0.06679692336489 0.326 0.21 0.000195
2021-Dec-30 00:00 * 213.38661 -3.03722 0.07362471390734 0.284 0.17 0.000197
2022-Jan-01 00:00 * 214.31009 -4.96636 0.08050761609688 0.249 0.15 0.000198
2008 UZ94
JPL/Horizons solution 80, # obs: 331 (2008-2021)
2021 Nov 30
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2021-Nov-29 00:00 * 297.90273 14.09088 0.09226604799782 1.164 3.21 0.000913
2021-Nov-30 00:00 * 300.74201 9.71866 0.08363418690178 1.359 4.25 0.000893
2021-Dec-01 00:00 * 304.08353 4.35288 0.07582672693835 1.616 5.74 0.000864 Scheduled
2021-Dec-02 00:00 * 308.05169 -2.17399 0.06912902847546 1.943 7.80 0.000820
2021-Dec-03 00:00 * 312.79929 -9.92266 0.06389436904709 2.328 10.36 0.000757
2021-Dec-04 00:00 *m 318.50334 -18.70572 0.06050455549218 2.720 13.00 0.000675
2021-Dec-05 00:00 *m 325.34400 -27.96977 0.05927525584081 3.023 14.86 0.000579
JPL/Horizons solution 68, # obs: 284 (2008-2021)
2021 Nov 3
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta POS_3sigma DOP_X_3sig RT_delay_3sig
2021-Nov-29 00:00 * 297.90290 14.09083 0.09226639943314 2.098 4.60 0.001342
2021-Nov-30 00:00 * 300.74219 9.71863 0.08363455396834 2.348 5.72 0.001339
2021-Dec-01 00:00 * 304.08371 4.35287 0.07582710976459 2.661 7.31 0.001326 Scheduled
2021-Dec-02 00:00 * 308.05187 -2.17396 0.06912942505951 3.057 9.58 0.001298
2021-Dec-03 00:00 * 312.79947 -9.92258 0.06389477381934 3.540 12.68 0.001244
2021-Dec-04 00:00 *m 318.50350 -18.70557 0.06050495830879 4.068 16.26 0.001160
2021-Dec-05 00:00 *m 325.34412 -27.96955 0.05927564295394 4.529 19.28 0.001045
Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:
2003 SD220
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu%
2021-Nov-02 00:00 178.73888 64.66320 0.13649030058381 16.387 4.932 84.6493 /L 60.7/ 11.4821
2021-Nov-04 00:00 179.82051 65.24868 0.13204615869647 16.279 4.915 85.9448 /L 76.9/ 1.2160
2021-Nov-06 00:00 181.03044 65.86866 0.12746374186813 16.168 4.898 87.2163 /L 95.5/ 1.8672
2021-Nov-08 00:00 182.38665 66.52921 0.12275411651048 16.053 4.882 88.4634 /L 112.4/ 13.8587
2021-Nov-10 00:00 183.91509 67.23606 0.11792892913847 15.934 4.866 89.6841 /L 123.3/ 33.3965
2021-Nov-12 00:00 185.65285 67.99494 0.11299974986535 15.811 4.850 90.8752 /L 125.0/ 55.1708
2021-Nov-14 00:00 187.65195 68.81168 0.10797809294229 15.683 4.835 92.0319 /L 118.4/ 74.8893
2021-Nov-16 00:00 189.98501 69.69204 0.10287587393927 15.550 4.821 93.1486 /L 107.1/ 89.7939
2021-Nov-18 00:00 192.75423 70.64084 0.09770598332121 15.412 4.807 94.2177 /L 94.1/ 98.2842
2021-Nov-20 00:00 196.10564 71.66027 0.09248289604592 15.268 4.793 95.2300 /L 81.7/ 99.6517
2021-Nov-22 00:00 200.25120 72.74641 0.08722336165135 15.119 4.781 96.1730 /L 71.7/ 93.9935
2021-Nov-24 00:00 205.50139 73.88257 0.08194722987035 14.963 4.770 97.0307 /L 65.7/ 82.0851
2021-Nov-26 00:00 212.30610 75.02635 0.07667847735115 14.803 4.760 97.7818 /L 65.3/ 65.2034
2021-Nov-28 00:00 221.27658 76.08575 0.07144654647076 14.637 4.752 98.3975 /L 70.6/ 45.1446
2021-Nov-30 00:00 233.07963 76.88074 0.06628814386360 14.467 4.748 98.8391 /L 80.1/ 24.6511
2021-Dec-02 00:00 247.95693 77.10441 0.06124960647587 14.295 4.746 99.0544 /L 90.9/ 7.9559
2021-Dec-04 00:00 264.84476 76.34719 0.05638981160175 14.125 4.750 98.9726 /T 99.1/ 0.1617
2021-Dec-06 00:00 281.29682 74.24599 0.05178356459493 13.961 4.761 98.4999 /T 100.6/ 4.3407
2021-Dec-08 00:00 295.18671 70.62732 0.04752560435910 13.814 4.781 97.5164 /T 94.4/ 18.8880
2021-Dec-10 00:00 305.94632 65.47261 0.04373492162657 13.695 4.813 95.8820 /T 83.8/ 38.9237
2021-Dec-12 00:00 314.03456 58.82866 0.04055668368831 13.623 4.860 93.4613 /T 73.5/ 59.6460
2021-Dec-14 00:00 320.12752 50.81448 0.03815571830423 13.617 4.927 90.1752 /T 68.8/ 77.7817
2021-Dec-16 00:00 324.78620 41.69928 0.03669446165689 13.697 5.014 86.0733 /T 73.8/ 91.2726
2021-Dec-18 00:00 328.41103 31.95382 0.03629457505750 13.875 5.119 81.3833 /T 88.3/ 98.7433
2021-Dec-20 00:00 331.27605 22.18741 0.03699725512644 14.145 5.238 76.4710 /T 109.1/ 99.3501
2021-Dec-22 00:00 333.56825 12.97670 0.03874842398603 14.485 5.364 71.7098 /T 133.1/ 92.8881
2021-Dec-24 00:00 335.41680 4.70706 0.04142049382237 14.868 5.491 67.3536 /T 156.7/ 79.8873
2021-Dec-26 00:00 336.91243 -2.46981 0.04485382500065 15.267 5.611 63.5000 /T 162.4/ 61.6410
2021-Dec-28 00:00 338.12000 -8.57800 0.04889244730237 15.665 5.725 60.1321 /T 138.7/ 40.3806
2021-Dec-30 00:00 339.08641 -13.73343 0.05340280906793 16. 6. 57.1789 /T 109.7/ 19.7218
2022-Jan-01 00:00 339.84552 -18.08112 0.05827861403009 16. 6. 54.5569 /T 79.0/ 4.7342
Nereus
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu%
2021-Oct-23 00:00 45.59602 24.87654 0.23251911744560 16.485 2.655 158.3613 /L 9.826/ 94.8626
2021-Oct-25 00:00 45.83412 25.33891 0.22022310981799 16.315 2.606 159.7639 /L 29.7/ 83.5882
2021-Oct-27 00:00 46.05763 25.82416 0.20827967657244 16.142 2.556 161.1152 /L 52.4/ 67.5496
2021-Oct-29 00:00 46.26834 26.33559 0.19668328000111 15.966 2.507 162.3953 /L 75.9/ 48.5180
2021-Oct-31 00:00 46.46873 26.87710 0.18542819150948 15.788 2.459 163.5787 /L 100.6/ 28.7324
2021-Nov-02 00:00 46.66222 27.45338 0.17450843590884 15.609 2.414 164.6331 /L 126.9/ 11.4821
2021-Nov-04 00:00 46.85360 28.07016 0.16391752030377 15.430 2.372 165.5200 /L 153.9/ 1.2160
2021-Nov-06 00:00 47.04941 28.73463 0.15364770898487 15.253 2.336 166.1956 /L 167.1/ 1.8672
2021-Nov-08 00:00 47.25818 29.45577 0.14368910348065 15.078 2.307 166.6167 /L 142.8/ 13.8587
2021-Nov-10 00:00 47.49036 30.24476 0.13402944318803 14.907 2.288 166.7479 /L 115.5/ 33.3965
2021-Nov-12 00:00 47.75844 31.11541 0.12465505757023 14.741 2.278 166.5703 /L 89.4/ 55.1708
2021-Nov-14 00:00 48.07762 32.08491 0.11555227319513 14.577 2.278 166.0851 /T 64.9/ 74.8893
2021-Nov-16 00:00 48.46689 33.17491 0.10670858462024 14.415 2.287 165.3103 /T 42.2/ 89.7939
2021-Nov-18 00:00 48.95090 34.41310 0.09811358387334 14.252 2.304 164.2723 /T 22.9/ 98.2842
2021-Nov-20 00:00 49.56300 35.83547 0.08975992713024 14.085 2.328 162.9959 /T 18.5/ 99.6517
2021-Nov-22 00:00 50.35022 37.48946 0.08164458404361 13.913 2.357 161.4954 /T 33.9/ 93.9935
2021-Nov-24 00:00 51.38214 39.43856 0.07377063100764 13.732 2.391 159.7663 /T 53.8/ 82.0851
2021-Nov-26 00:00 52.76714 41.76861 0.06615002645699 13.542 2.431 157.7757 /T 74.6/ 65.2034
2021-Nov-28 00:00 54.68458 44.59601 0.05880813316211 13.343 2.478 155.4486 /T 95.6/ 45.1446
2021-Nov-30 00:00 57.45390 48.07568 0.05179126716056 13.135 2.535 152.6444 /T 116.3/ 24.6511
2021-Dec-02 00:00 61.69804 52.39764 0.04517938456241 12.926 2.606 149.1208 /T 134.5/ 7.9559
2021-Dec-04 00:00 68.77317 57.72430 0.03910715263003 12.730 2.698 144.4853 /T 144.3/ 0.1617
2021-Dec-06 00:00 81.96785 63.86497 0.03379653584939 12.575 2.819 138.1660 /L 140.9/ 4.3407
2021-Dec-08 00:00 108.52782 68.94040 0.02959421996343 12.513 2.978 129.5199 /L 132.2/ 18.8880
2021-Dec-10 00:00 148.16018 67.35164 0.02696650862184 12.618 3.176 118.3187 /L 126.7/ 38.9237
2021-Dec-12 00:00 176.34301 57.18753 0.02634613553351 12.949 3.399 105.5615 /L 126.3/ 59.6460
2021-Dec-14 00:00 190.47426 44.11242 0.02783962210765 13.482 3.625 93.4308 /L 127.1/ 77.7817
2021-Dec-16 00:00 198.06763 32.20535 0.03112709133842 14.104 3.826 83.7161 /L 123.5/ 91.2726
2021-Dec-18 00:00 202.68716 22.68733 0.03570567045952 14.706 3.984 76.8141 /L 113.6/ 98.7433
2021-Dec-20 00:00 205.79255 15.39622 0.04113857343395 15.228 4.096 72.2503 /L 98.5/ 99.3501
2021-Dec-22 00:00 208.04640 9.82008 0.04712371236930 15.657 4.165 69.3860 /L 80.3/ 92.8881
2021-Dec-24 00:00 209.78411 5.49001 0.05346734209687 16.003 4.200 67.7018 /L 59.9/ 79.8873
2021-Dec-26 00:00 211.19094 2.05723 0.06004542267743 16.278 4.210 66.8323 /L 37.8/ 61.6410
2021-Dec-28 00:00 212.37624 -0.72264 0.06677596032410 16.499 4.202 66.5315 /L 14.9/ 40.3806
2021-Dec-30 00:00 213.40778 -3.01901 0.07360234910674 16.676 4.181 66.6351 /L 16.0/ 19.7218
2008 UZ94
Date__(UT)__HR:MN R.A._(a-appar)_DEC. delta APmag S-brt S-O-T /r T-O-M/MN_Illu%
2021-Nov-16 00:00 280.77494 33.99184 0.22836604969462 17.499 n.a. 70.5881 /T 93.2/ 89.7939
2021-Nov-18 00:00 282.24890 32.82983 0.20664341195647 17.378 n.a. 69.8175 /T 104.1/ 98.2842
2021-Nov-20 00:00 283.96036 31.33192 0.18491931430200 17.244 n.a. 68.9400 /T 114.1/ 99.6517
2021-Nov-22 00:00 285.98850 29.36030 0.16331575717161 17.095 n.a. 67.9218 /T 122.2/ 93.9935
2021-Nov-24 00:00 288.44970 26.69882 0.14200763105550 16.928 n.a. 66.7218 /T 127.3/ 82.0851
2021-Nov-26 00:00 291.51976 22.99559 0.12126612724732 16.741 n.a. 65.3012 /T 127.9/ 65.2034
2021-Nov-28 00:00 295.47260 17.66254 0.10154714282158 16.530 n.a. 63.6643 /T 122.7/ 45.1446
2021-Nov-30 00:00 300.74706 9.73130 0.08367278891163 16.290 n.a. 62.0116 /T 110.7/ 24.6511
2021-Dec-02 00:00 308.05501 -2.15242 0.06916354366827 15.996 n.a. 61.1880 /T 91.8/ 7.9559
2021-Dec-04 00:00 318.50207 -18.67273 0.06053044852028 15.610 n.a. 63.2421 /T 67.8/ 0.1617
2021-Dec-06 00:00 333.44047 -36.82414 0.06034741732355 15.225 n.a. 69.6033 /T 47.1/ 4.3407
2021-Dec-08 00:00 353.12202 -50.45755 0.06864585631093 15.073 n.a. 77.6526 /T 42.5/ 18.8880
2021-Dec-10 00:00 14.31728 -57.19700 0.08286242170446 15.162 n.a. 84.3207 /T 50.3/ 38.9237
2021-Dec-12 00:00 32.19012 -59.19224 0.10045343330116 15.367 n.a. 89.0870 /T 59.9/ 59.6460
2021-Dec-14 00:00 45.10978 -59.03846 0.11987721430178 15.605 n.a. 92.4451 /T 68.1/ 77.7817
2021-Dec-16 00:00 54.06648 -58.14289 0.14030923191675 15.842 n.a. 94.8821 /T 75.0/ 91.2726
2021-Dec-18 00:00 60.37621 -57.06781 0.16130334381571 16.066 n.a. 96.7209 /T 81.1/ 98.7433
2021-Dec-20 00:00 64.97293 -56.00731 0.18260557303116 16.274 n.a. 98.1613 /T 86.9/ 99.3501
2021-Dec-22 00:00 68.44097 -55.01768 0.20406326883450 16.466 n.a. 99.3277 /T 92.6/ 92.8881
Setups
2003 SD220
This object is going to have a narrow bandwidth due to its extremely slow rotation.
The bandwidth will barely change during individual tracks but could vary by more than
a factor of two over several days due to the elongated shape and if this asteroid is
in a non-principal axis spin state, which seems likely.
CW setup for 2003 SD220
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: no hopping
Bandwidth: 5000 Hz
TXoffset +500 Hz
FFT 50000 for 0.1 Hz resolution
Ranging setups:
---------------------------------------------------------------------------
10-usec
baud 10 usec
code 127
PRP 1270 usec
FFT 128
ncoh 1
bandwidth 787 Hz
resolution 12.3 Hz
TXOFF +100Hz (echo in bin 32 + 8 = 40)
---------------------------------------------------------------------------
11-usec
baud 11 usec
code 127
PRP 1397 usec
FFT 64
ncoh 1
bandwidth 716 Hz
resolution 11.2 Hz
TXOFF +100 Hz (echo in bin 32 + 9= 41)
-------------------------------------------------------------------------
1-usec
baud 1 usec
code 255
FFT 512
ncoh 16
bandwidth 245 Hz
resolution 0.48 Hz
TXOFF +50 Hz
---------------------------------------------------------------------
NOTE: Data should be moved to the appropriate subdirectories in
aardvark:/export/data0/a163899/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
==============================================================================
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/2003SD220/2003SD220_planning.2021.html
Asteroid Radar Astronomy
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