2006 VV2 Planning
2006 VV2 was discovered by LINEAR (MIT) on November 11, 2006. It will approach within 0.023 AU (8.8 lunar distances) on March 31 when it will be a very strong radar imaging target. Its physical properties are unknown, but its absolute magnitude of 16.7 suggests a diameter within a factor of two of 1.5 km. If past experience is a guide, then there is a ~1/6 chance that it is a binary system. This is the closest approach predicted for an object this intrinsically bright until May 2036, when (66391) 1999 KW4 will approach within 6.0 lunar distances. Goldstone observations are scheduled on March 27, 30, and April 1-3. Arecibo observations are scheduled on March 31 and April 1. We intend to devote some time to testing the chirp/digital receiver system on March 30 and April 1. We will also observe bistatically on March 30 and April 1, transmitting with DSS-14 and receiving echoes with the Very Long Baseline Array (VLBA) during part of the tracks. We will monitor the observations by receiving at DSS-13 on those days. 2006 VV2 will be an optically bright object: it may reach 10th magnitude at closest approach and should be visible in small telescopes. Consequently, it's an excellent target for photometry, spectroscopy, and infrared radiometry. Due to the proximity of its orbit to Earth and its diameter, 2006 VV2 has been classified as a "Potentially Hazardous Asteroid" by the Minor Planet Center.
Orbital and Physical Characteristics orbit type Apollo semimajor axis 2.388 AU eccentricity 0.602 inclination 23.6° perihelion distance 0.949 AU aphelion distance 3.826 AU absolute magnitude (H) 16.7 diameter 1.5 km +- a factor of two rotation period 2.43 h pole direction unknown lightcurve amplitude unknown spectral class unknown Last updated: 2007 April 04
M.P.E.C. 2006-V47 Issued 2006 Nov. 13, 17:06 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2006 VV2
Observations:
K06V02V* C2006 11 11.25116 03 05 40.81 +57 03 58.5 18.4 EV047704
K06V02V C2006 11 11.26344 03 05 38.28 +57 04 17.1 18.7 EV047704
K06V02V C2006 11 11.27606 03 05 35.77 +57 04 35.9 18.7 EV047704
K06V02V C2006 11 11.28834 03 05 33.27 +57 04 55.1 18.4 EV047704
K06V02V C2006 11 11.30066 03 05 30.55 +57 05 12.3 18.6 EV047704
K06V02V C2006 11 11.95517 03 03 20.60 +57 21 42.1 18.1 R EV047204
K06V02V C2006 11 11.95875 03 03 19.87 +57 21 47.4 EV047204
K06V02V C2006 11 11.96221 03 03 19.15 +57 21 52.7 EV047204
K06V02V C2006 11 11.98646 03 03 14.17 +57 22 30.6 17.9 EV047176
K06V02V C2006 11 11.98731 03 03 14.01 +57 22 31.8 17.7 EV047176
K06V02V C2006 11 11.99536 03 03 12.33 +57 22 43.6 17.6 EV047176
K06V02V C2006 11 11.99623 03 03 12.13 +57 22 44.8 17.4 EV047176
K06V02V C2006 11 11.99708 03 03 12.00 +57 22 46.2 17.5 EV047176
K06V02V C2006 11 12.00605 03 03 10.16 +57 22 59.7 18.7 V EV047939
K06V02V C2006 11 12.01992 03 03 07.32 +57 23 20.8 18.7 V EV047939
K06V02V C2006 11 12.22943 03 02 25.17 +57 28 34.1 18.0 R EV047H36
K06V02V C2006 11 12.23491 03 02 23.71 +57 28 44.0 18.0 R EV047H36
K06V02V C2006 11 12.25345 03 02 20.20 +57 29 12.3 17.2 V EV047703
K06V02V C2006 11 12.26478 03 02 17.80 +57 29 29.6 17.3 V EV047703
K06V02V C2006 11 12.27674 03 02 15.27 +57 29 46.7 19.2 R EV047854
K06V02V C2006 11 12.27770 03 02 15.03 +57 29 49.0 19.3 R EV047854
K06V02V C2006 11 12.27961 03 02 14.66 +57 29 51.3 19.2 R EV047854
K06V02V C2006 11 12.56803 03 01 15.60 +57 37 03.0 18.8 V EV047D35
K06V02V C2006 11 12.56956 03 01 15.28 +57 37 05.2 18.7 V EV047D35
K06V02V C2006 11 12.57112 03 01 14.94 +57 37 07.6 18.6 V EV047D35
K06V02V C2006 11 12.79522 03 00 28.60 +57 42 32.6 18.5 EV047130
K06V02V C2006 11 12.79647 03 00 28.34 +57 42 34.9 18.8 EV047130
K06V02V C2006 11 12.79822 03 00 27.86 +57 42 37.2 19.1 EV047130
K06V02V C2006 11 13.16845 02 59 09.58 +57 51 47.8 17.4 R EV047850
K06V02V C2006 11 13.17891 02 59 07.18 +57 52 03.2 18.0 R EV047850
K06V02V C2006 11 13.18829 02 59 05.00 +57 52 17.4 18.1 R EV047850
K06V02V 5C2006 11 13.21487302 58 59.863+57 52 54.81 18.0 R EV047673
K06V02V 5C2006 11 13.22112302 58 58.493+57 53 04.04 EV047673
K06V02V 5C2006 11 13.23015002 58 56.509+57 53 17.52 EV047673
K06V02V 5C2006 11 13.23431702 58 55.602+57 53 23.77 EV047673
Observer details:
130 Lumezzane. Observers M. Casali, W. Marinello, M. Micheli, G. Pizzetti,
A. Soffiantini. Measurers W. Marinello, M. Micheli. 0.40-m f/4.5
reflector + CCD.
176 Observatori Astronomic de Consell. Observers A. Lopez, R. Pacheco.
0.41-m f/4 reflector + CCD.
204 Schiaparelli Observatory. Observers L. Buzzi, F. Luppi. Measurer
L. Buzzi. 0.60-m f/4.64 reflector + CCD.
673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.61-m f/16
Cassegrain + CCD.
703 Catalina Sky Survey. Observer A. R. Gibbs. Measurers E. C. Beshore,
E. J. Christensen, G. J. Garradd, A. R. Gibbs, A. D. Grauer, R. E. Hill,
R. A. Kowalski, S. M. Larson, R. H. McNaught. 0.68-m Schmidt + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Bezpalko, L. Manguso,
D. Torres, R. Kracke, H. Love, G. Spitz, J. Kistler. Measurers J. Stuart,
J. Kommers. 1.0-m f/2.15 reflector + CCD.
850 Cordell-Lorenz Observatory, Sewanee. Observers D. T. Durig, J. G. Vicars.
0.30-m f/9.7 Schmidt-Cassegrain + 1Kx1K CCD.
854 Sabino Canyon Observatory, Tucson. Observer J. E. McGaha. 0.36-m f/10.0
Schmidt-Cassegrain + CCD.
939 Observatorio Rodeno. Observer J. Castellano. 0.20-m f/3.3
Schmidt-Cassegrain + CCD.
D35 Lulin Observatory. Observers H.-C. Lin, C.-S. Lin, Q.-z. Ye. Measurer
Q.-z. Ye. 0.41-m f/8.8 Ritchey-Chretien + 2Kx2K CCD.
H36 Sandlot Observatory, Scranton. Observer G. Hug. 0.30-m
Schmidt-Cassegrain + CCD.
Orbital elements:
2006 VV2 PHA, Earth MOID = 0.0054 AU
Epoch 2006 Sept. 22.0 TT = JDT 2454000.5 MPC
M 321.07228 (2000.0) P Q
n 0.24039417 Peri. 145.51626 -0.90145443 -0.42718131
a 2.5616518 Node 9.96445 +0.24599020 -0.63854214
e 0.6384366 Incl. 23.85190 +0.35618636 -0.64014066
P 4.10 H 16.4 G 0.15 U 9
Residuals in seconds of arc
061111 704 0.1+ 0.6+ 061111 176 0.5+ 0.2- 061112 D35 1.1- 0.9+
061111 704 0.2- 0.4+ 061112 939 0.3+ 0.2- 061112 130 0.2- 0.5-
061111 704 0.2+ 0.1- 061112 939 0.8+ 0.1+ 061112 130 0.1- 0.1-
061111 704 0.2+ 0.4+ 061112 H36 1.7+ 1.1- 061112 130 1.0- 0.4-
061111 704 1.6- 1.1- 061112 H36 0.8- 0.6+ 061113 850 1.1+ 0.1+
061111 204 0.2+ 0.2- 061112 703 0.1+ 0.2+ 061113 850 0.3+ 0.0
061111 204 0.3+ 0.3- 061112 703 0.1+ 0.4+ 061113 850 0.7- 0.4+
061111 204 0.3+ 0.2- 061112 854 0.1+ 0.5- 061113 673 0.2+ 0.2-
061111 176 0.1+ 0.1+ 061112 854 0.2- 0.4+ 061113 673 0.2+ 0.3-
061111 176 0.3+ 0.0 061112 854 0.1+ 0.2- 061113 673 0.1+ 0.3-
061111 176 0.3+ 0.3- 061112 D35 1.1- 1.0+ 061113 673 0.2+ 0.2-
061111 176 0.1+ 0.4- 061112 D35 1.0- 0.9+
Ephemeris:
2006 VV2 a,e,i = 2.56, 0.64, 24 q = 0.9262
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
.
.
2007 01 30 22 55.11 +59 27.1 0.478 1.029 81.5 71.1 17.4
2007 02 09 22 47.18 +59 55.9 0.416 0.977 76.5 79.0 17.2
2007 02 19 22 35.66 +60 25.0 0.342 0.942 72.2 87.6 17.0
2007 03 01 22 16.01 +60 07.2 0.257 0.927 68.2 96.9 16.8
2007 03 11 21 41.39 +56 56.4 0.166 0.933 64.3 106.4 16.3
2007 03 21 20 35.91 +40 20.4 0.0776 0.961 61.3 114.6 15.2
2007 03 31 18 10.51 -45 58.3 0.0563 1.007 97.2 79.6 12.9
2007 04 10 14 49.16 -70 21.6 0.138 1.068 115.5 57.8 14.3
2007 04 20 13 12.16 -70 10.6 0.231 1.140 120.8 49.2 15.3
2007 04 30 12 39.53 -67 51.0 0.327 1.220 123.9 43.2 16.1
2007 05 10 12 32.40 -65 17.2 0.425 1.304 125.8 38.9 16.7
2007 05 20 12 37.44 -62 44.9 0.527 1.392 126.6 35.7 17.2
2007 05 30 12 49.26 -60 21.4 0.635 1.480 126.2 33.5 17.7
2007 06 09 13 04.93 -58 10.1 0.751 1.569 124.8 32.1 18.1
2007 06 19 13 22.93 -56 12.1 0.875 1.658 122.4 31.2 18.5
2007 06 29 13 42.40 -54 28.6 1.007 1.746 119.2 30.5 18.9
.
.
Kyle E. Smalley (C) Copyright 2006 MPC M.P.E.C. 2006-V47
Target Name: 2006 VV2
HMag: 16.7
Diameter: 1.5 km (an educated guess assuming H = 16.7 and an S-class optical albedo)
Period: 2.43 h (Jozef Vilagi, Leos Kornos, and Stefan Gajdos at Modra Observatory in Slovakia)
------------GOLDSTONE---------- -------------ARECIBO-----------
Max Max
Date Run UTC Date Run UTC
Date RA Decl Delta Runs SNR SNR Window Runs SNR SNR Window
2007 3 22 359 77 0.093 425 86 5 0:00-24:00 0 0 0 -
2007 3 23 1 78 0.083 468 130 7 0:00-24:00 0 0 0 -
2007 3 24 6 80 0.074 520 210 10 0:00-24:00 0 0 0 -
2007 3 25 14 82 0.065 584 350 16 0:00-24:00 0 0 0 -
2007 3 26 37 85 0.056 665 630 26 0:00-24:00 0 0 0 -
2007 3 27 94 85 0.047 700 1200 47 0:00-24:00 0 0 0 -
2007 3 28 133 80 0.039 700 2300 94 0:00-24:00 0 0 0 -
2007 3 29 147 70 0.032 700 4800 200 20:06-38:23 0 0 0 -
2007 3 30 154 55 0.026 700 10100 420 22:30-36:36 0 0 0 -
2007 3 31 157 33 0.023 700 15600 640 23:53-35:30 125 195000 19000 1:30- 3:23
2007 4 1 159 9 0.024 568 11800 550 1:11-10:35 137 187000 17000 1:23- 3:42
2007 4 2 161 -10 0.028 404 5100 280 2:12- 9:35 0 0 0 -
2007 4 3 162 -23 0.035 268 1700 120 3:17- 8:30 0 0 0 -
2007 4 4 163 -31 0.043 166 580 49 4:30- 7:17 0 0 0 -
2007 4 5 163 -37 0.052 81 190 22 - 0 0 0 -
2007 4 6 164 -41 0.061 0 0 0 - 0 0 0 -
2006 VV2 Goldstone Schedule
P = 2.43 h
UT UT PDT AST Duration Round-trip
DOY Date TX Window TX Window TX Window hh:mm time (sec) Rotations
--- ---- --------- --------- --------- ------- --------- ---------
086 Mar 27 1020-1430 0320-0730 Mar 27 0620-1030 Mar 27 4:10 43 1.71
089 Mar 30 0245-0645 1945-2345 Mar 29 2245-0245 Mar 28-29 4:00 25 1.65
091 Apr 01 0110-0635 1810-2335 Mar 31 2110-0235 Mar 31-Apr 1 5:25 24 2.23
092 Apr 02 0345-0745 2045-0045 Apr 1-2 2345-0345 Apr 1-2 4:00 30 1.65
093 Apr 03 0355-0700 2055-0000 Apr 2-3 2355-0300 Apr 2-3 3:05 37 1.27
Round-trip times are given during actual tracks, not at 00:00 UTC as in the SNR estimates above.
Arecibo Schedule
090 Mar 31 0119-0338 1819-2038 Mar 30 2119-2338 Mar 30 2:19 23 0.95
091 Apr 01 0123-0330 1823-2030 Mar 31 2123-2330 Mar 31 2:07 24 0.87
Goldstone-VLBA and Arecibo-VLBA Schedules (includes the GBT)
089 Mar 30 0300-0400 Goldstone transmit
091 Apr 01 0100-0300 Arecibo transmit (note that VV2 does not rise at Arecibo until 0123)
091 Apr 01 0430-0530 Goldstone transmit <-- NOTE THE CHANGE! We moved it one hour later to improve rotation coverage.
The April 1 Arecibo track entirely overlaps the Goldstone track on that day.
The March 31 Arecibo observations are monostatic only.
From Jon Giorgini, 2006 December 21: With 171 optical obs (2002-Oct-4 to 2006-Dec-17), 2006 VV2 solution #18 was computed. Nominal 3-sigma X-band uncertainties are as shown below: Date__(UT)__HR:MN POS_3sigma DOP_X-sig RT_delay-sig 2007-Mar-29 00:00 85.8600319 24.19 0.024508 2007-Mar-30 00:00 95.4908052 31.78 0.025385 2007-Mar-31 00:00 139.230914 39.55 0.023742 2007-Apr-01 00:00 187.886773 42.31 0.018523 2007-Apr-02 00:00 187.065898 39.91 0.012755 2007-Apr-03 00:00 161.435073 36.29 0.008990 2007-Apr-04 00:00 135.215408 33.26 0.007271 - - - - - - - - - - - - - - - - - - - - From Horizons, 2007 February 05. Solution #28, # obs: 245 (2002-2007) Date__(UT)__HR:MN R.A._(J2000.0)_DEC. delta POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2007-Mar-27 00:00 93.54698 85.25469 .047205871586183 23.8068886 1.93 6.91 0.011003 2007-Mar-28 00:00 133.84527 80.18004 .038928245515984 27.8733246 2.00 7.14 0.011112 2007-Mar-29 00:00 147.63703 70.32648 .031497770406630 35.2556753 2.23 7.98 0.011071 2007-Mar-30 00:00 153.77302 54.67885 .025676609526550 52.1586790 2.81 10.06 0.010481 2007-Mar-31 00:00 157.17646 32.52728 .022751298605389 79.9565030 3.69 13.18 0.008648 2007-Apr-01 00:00 159.33582 8.47516 .023825947043785 94.3257608 4.31 15.42 0.005870 2007-Apr-02 00:00 160.83273 -10.55423 .028458984699659 84.6390931 4.43 15.84 0.004158 2007-Apr-03 00:00 161.93820 -23.26758 .035280626418561 68.4689270 4.32 15.44 0.004115 2007-Apr-04 00:00 162.79482 -31.57645 .043271671543646 55.0236659 4.17 14.93 0.004610 - - - - - - - - - - - - - - - - - - - - From Horizons, 2007 March 14. Solution #32, #obs: 262 (2002-2007) 2007-Mar-27 00:00 93.55705 85.25645 .047202315417871 9.07559386 1.36 4.88 0.005372 2007-Mar-28 00:00 133.85937 80.18053 .038924735850508 13.5750656 1.29 4.60 0.005103 2007-Mar-29 00:00 147.64676 70.32535 .031494404177118 21.5601198 1.13 4.04 0.004606 2007-Mar-30 00:00 153.78014 54.67523 .025673645445635 34.3785572 0.86 3.08 0.003632 2007-Mar-31 00:00 157.18203 32.52063 .022749237836956 47.0631821 0.67 2.38 0.002004 2007-Apr-01 00:00 159.34038 8.46740 .023825175324833 46.5566283 0.96 3.43 0.001212 2007-Apr-02 00:00 160.83659 -10.56083 .028459313721344 35.5879130 1.31 4.69 0.002383 2007-Apr-03 00:00 161.94154 -23.27261 .035281656714076 25.3062738 1.52 5.43 0.003233 2007-Apr-04 00:00 162.79777 -31.58028 .043273117215395 18.3819278 1.63 5.84 0.003705 - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2007 March 23: With 303 optical measurements (2002-Oct-4 to 2007-Mar-23), 2006 VV2 solution #41 was computed. Formal 3-sigma S/X-band uncertainties are as shown below. Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2007-Mar-27 00:00 4.61107638 0.82 2.93 0.003873 2007-Mar-28 00:00 7.71542009 0.74 2.65 0.003704 2007-Mar-29 00:00 13.3873445 0.59 2.13 0.003376 2007-Mar-30 00:00 22.7772860 0.35 1.25 0.002698 2007-Mar-31 00:00 32.6035525 0.30 1.09 0.001463 2007-Apr-01 00:00 33.1710267 0.70 2.50 0.000357 2007-Apr-02 00:00 25.7515864 0.98 3.52 0.001372 2007-Apr-03 00:00 18.4407080 1.13 4.04 0.002061 2007-Apr-04 00:00 13.4157801 1.20 4.29 0.002444 - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2007 March 26: With 390 optical measurements (2002-Oct-4 to 2007-Mar-26), 2006 VV2 solution #46 was estimated. Formal 3-sigma X-band uncertainties are shown below: Date__(UT)__HR:MN POS_3sigma DOP_X-sig RT_delay-sig 2007-Mar-27 00:00 0.969895973 1.06 0.001518 2007-Mar-28 00:00 1.95006918 0.93 0.001480 2007-Mar-29 00:00 3.94291657 0.73 0.001392 2007-Mar-30 00:00 7.52968699 0.56 0.001182 2007-Mar-31 00:00 11.7570619 0.90 0.000754 2007-Apr-01 00:00 12.7958960 1.45 0.000203 2007-Apr-02 00:00 10.4853386 1.78 0.000323 2007-Apr-03 00:00 7.84687100 1.92 0.000606 2007-Apr-04 00:00 5.92102804 1.98 0.000772 OSOD and nominal predicts have been established on stealth. Horizons has been updated with the new solution #46. - - - - - - - - - - - - - - - - - - - - From Jon Giorgini, 2007 March 28: Lance reported no apparent Doppler offset and a -2+/-3 usec delay correction from the DSS-14 March 27 track (relative to pre-experiment solution #46). Considering the formal 3-sigma uncertainty was 1501 usec and 1.00 Hz, this was a 0.004_sigma delay acquisition. Subsequent optical data was generally within 0.1" of that prediction as well. So the pre-experiment prediction, based opn optical measurements, was basically dead-on. However, that DSS-14 delay measurement and 71 newly reported optical measurements have been incorporated into a new solution: With 461 optical measurements spanning 2002-Oct-4 to 2007-Mar 28, the single DSS-14 delay, solution #50 was estimated. Nominal 3-sigma uncertainties X/S-band uncertainties are as shown below: Date__(UT)__HR:MN POS_3sigma DOP_S-sig DOP_X-sig RT_delay-sig 2007-Mar-27 00:00 .405696325 0.21 0.76 0.000011 2007-Mar-28 00:00 .505521656 0.20 0.72 0.000011 2007-Mar-29 00:00 .640082853 0.18 0.64 0.000022 2007-Mar-30 00:00 .787604410 0.14 0.51 0.000040 2007-Mar-31 00:00 .859446373 0.12 0.41 0.000061 2007-Apr-01 00:00 .805217282 0.14 0.51 0.000076 2007-Apr-02 00:00 .711978958 0.19 0.66 0.000084 2007-Apr-03 00:00 .626112020 0.21 0.75 0.000088 2007-Apr-04 00:00 .555329875 0.22 0.80 0.000092 This solution #50 is now in Horizons.
WE WILL START WITH SOLUTION 50
Here's the plan for the 2006 VV2 Goldstone tracks:
March 27 (DOY 86)
-----------------
Start with our standard approach for the first day of any experiment:
Monostatic CW
10 usec, 11 usec, and 1 usec ranging
1/8 usec imaging
No chirping.
VV2 is circumpolar on March 27 so we need to pay careful attention to the PRDX and PUNCH files.
March 30 (DOY 89)
-----------------
Start with CW set up for the VLBA and DSS-13 from 0245-0400.
Switch to binary-phase coded 1/8 usec imaging. (monostatic)
Test the chirp/digital receiver in the last 45 minutes (monostatic)
April 01 (DOY 91)
-----------------
Start with 1/8 usec binary-phase coded imaging. (monostatic or bistatic with DSS13)
Switch to CW for the VLBA observations (and DSS-13)
If the chirp system works on March 30, use it again at the end of the April 1 track.
April 02 (DOY 92)
-----------------
Start with ~10 runs of monostatic CW.
Then do 1/8 usec monostatic imaging for the rest of the track
No chirping.
April 03 (DOY 93)
-----------------
This is a really short track--only about 3 hours--so do 1/8 usec imaging only.
No chirping.
CW setup for the March 30 track (bistatic)
------------------------------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: NONE--NO HOPPING
Dwell: 30 seconds
Bandwidth: 4000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 4096 for 0.98-Hz resolution
Monostatic CW setup
-------------------
TX polarization RCP
RCV polarization LCP & RCP
Frequency hops: 2
Dwell: 10 seconds
Bandwidth: 4000 Hz
Sampling interval: 2500 x 0.1 usec
VME FFT for PSD files: 2048 for 1.95-Hz resolution
Possible ranging setups:
---------------------------------------------------------------------------
127 x 64 10-usec single sample
baud 10 usec
code 127
gates 127
PRP 1270 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 787.4 Hz
resolution 12.3 Hz
TXOFF +100 Hz -> echo will be centered at +8 bins or in bin 32 + 8 = 40
---------------------------------------------------------------------------
127 x 64 11-usec single sample
baud 11 usec
code 127
gates 127
PRP 1397 usec
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 715.8 Hz
resolution 11.2 Hz
TXOFF +100 Hz --> echo will be centered at +9 bins or in bin 32 + 9 = 41
-------------------------------------------------------------------------
127 x 64 7-usec single sample
------------------------------
baud 7 usec
code 127
gates 127
PRP 889
FFT 64
CLT VME ?
PFS ?
ncoh 1
bandwidth 1124.9 Hz
resolution 17.6 Hz
TXOFF +60 -> echo would be centered at +3.4 bins w/perfect ephemeris
-------------------------------------------------------------------------
127 x 64 1-usec single sample
------------------------------
baud 1 usec
code 127
gates 127
PRP 127
FFT 64
CLT 4
ncoh 15
bandwidth 525 Hz
resolution 8.2 Hz
TXOFF +100 -> echo would be centered at +12.2 bins or in bin 32 + 12.2 = 44
-------------------------------------------------------------------------------
0.125-usec ranging (left over from the 1992 UY4 observations in August, 2005)
------------------
setup JX1XS001 revised
baud 0.125 usec
code 127
gates 127
FFT 64
ncoh 984
bandwidth 64.016384 Hz
resolution 1.000256 Hz
TXOFF We used 10 Hz, placing COM in cell 32+10=42
Henceforth use 15 Hz, to put COM in 32+15=47
incoh sums 4 looks=> 8 sec/record => expect records per run ~ RTT/8
PFS CLT gate 21
_____________________________________________________________________
POSSIBLE RANGING SETUPS: (code=127, FFT=64, single-pol'n)
These are from JX, w/ max-band (min-acc) options from Ray Jurgens.
Currently configured for 5-sec records.
_______________________________________________________________________
Setup Baud RP 1-acc 1-acc
usec m usec band res acc band res
_______________________________________________________________________
JX1XS110 11.000 1650 1397.0 715.8 11.2 2 358 5.6
JX1XS070 7.000 1050 889.0 1124.9 17.6 3 375 5.9
JX1XS020 2.000 300 254.0 3937.0 61.5 12 328 5.1
4 984 15.4
JX1XS010 1.000 150 127.0 7874.0 123.0 41 192 3.0
8 984 15.4
JX1XS005 0.500 75 63.5 15748.0 246.1 123 128 2.0
15 1050 16.4
JX1XS002 0.250 37.5 31.75 31496.1 492.1 492 64 1.0
30 1050 16.4
JX1XS001 0.125 18.75 15.875 62992.1 984.3 1970 32 0.5
60 1050 16.4
____________________________________________________________________
OSOD and predicts are at Goldstone on stealth:
/export/data3/osod/ops/2006vv2/2006vv2.PRDX.OUT.Mar30-Apr04.DSS14-mono.s50
/2006vv2.PUNCH.OUT.Mar30-Apr04.DSS14-mono.s50
/2006vv2.PRDX.OUT.Mar30-Apr02.DSS14-GEO_DSS13.s50
/2006vv2.PUNCH.OUT.Mar30-Apr02.DSS14-GEO_DSS13.s50
/EPH.OUT.s50
and have been copied to:
/export/data0/rosema/2006VV2/support/
SUMMARY OF GOLDSTONE PRDX FILES
We need:
-a standard monostatic ephemeris for DSS-14 to be used during the normal observations.
For the VLBA observations:
A DSS-14 ephemeris with Doppler taken out on transmit, so that the
frequency at Earth COM is constant.
A DSS-13 ephemeris with Doppler from Earth COM taken out on receive.
The plan is to receive CW with DSS-13 during the VLBA tracks to make sure
that DSS-14 is pointed properly and the frequency of the signal is constant at
the geocenter.
Pointing ephemerides for the 10 VLBA stations and the GBT during the
Goldstone-VLBA tracks. The stations are only doing receive, and require
a constant geocenter frequency. We need a separate ephemeris for each station
because parallax is in the arcminute range, approximately the size of an antenna beamwidth.
POINTING
TX Offsets
Date (UTC) DOY hhmmss RA Dec Macro LHA Dec RTT OSOD
2007 03 27 086 090000 113.6303 83.9297 A 43.9 46
2007 03 27 086 100000 115.4595 83.7256 A 43.6
2007 03 27 086 110000 117.2262 83.5128 A 43.3
2007 03 27 086 120000 118.9303 83.2919 A -0.0199 -0.0027 42.9
2007 03 27 086 130000 120.5710 83.0637 A 42.6
2007 03 27 086 140000 122.1472 82.8289 A 42.2
2007 03 27 086 150000 123.6574 82.5881 A 41.9
2007 03 30 089 010000 154.0794 53.8667 A 25.4 50
2007 03 30 089 020000 154.2384 53.0680 A -0.0011 -0.0056 25.2
2007 03 30 089 030000 154.3867 52.2547 AB 25.1
2007 03 30 089 040000 154.5262 51.4260 B -0.0009 -0.0058 24.9
2007 03 30 089 050000 154.6591 50.5815 BC 24.7
2007 03 30 089 060000 154.7876 49.7211 C -0.0009 -0.0059 24.5
2007 03 30 089 070000 154.9141 48.8450 C 24.4
2007 04 01 091 010000 159.5093 7.5201 A 23.9 50
2007 04 01 091 020000 159.5718 6.6076 A -0.0004 -0.0061 24.0
2007 04 01 091 030000 159.6286 5.7047 AB 24.2
2007 04 01 091 040000 159.6809 4.8118 B -0.0003 -0.0060 24.3
2007 04 01 091 050000 159.7298 3.9292 BC 24.5
2007 04 01 091 060000 159.7768 3.0575 C -0.0003 -0.0060 24.6
2007 04 01 091 070000 159.8235 2.1969 C 24.8
2007 04 02 092 020000 161.0249 -11.8790 A 28.9 50
2007 04 02 092 030000 161.0644 -12.5059 A -0.0003 -0.0051 29.1
2007 04 02 092 040000 161.1003 -13.1214 AB 29.4
2007 04 02 092 050000 161.1336 -13.7252 B -0.0003 -0.0049 29.6
2007 04 02 092 060000 161.1654 -14.3173 BC 29.9
2007 04 02 092 070000 161.1970 -14.8978 C -0.0003 -0.0048 30.2
2007 04 02 092 080000 161.2296 -15.4668 C 30.5
2007 04 03 093 030000 162.1323 -24.5602 A 36.1 50
2007 04 03 093 040000 162.1582 -24.9619 A 36.4
2007 04 03 093 050000 162.1820 -25.3552 A -0.0003 -0.0039 36.8
2007 04 03 093 060000 162.2046 -25.7401 A 37.0
2007 04 03 093 070000 162.2271 -26.1168 A 37.4
2006vv2.PRDX.OUT.Mar30-Apr04.DSS14-mono.s50
TRANSMITTER: STATION #14, RECEIVER: STATION #14
RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL
2007 APR 01 01:10 23.9180765562 -300173.211 290.1154 7.3674 159.520 20.625
2007 APR 01 01:20 23.9392137856 -302947.714 292.6116 7.2149 159.531 22.558
2007 APR 01 01:30 23.9605465972 -305753.672 295.1079 7.0627 159.541 24.482
2007 APR 01 01:40 23.9820771707 -308590.382 297.6044 6.9107 159.552 26.397
2007 APR 01 01:50 24.0038076315 -311457.070 300.1011 6.7590 159.562 28.298
2007 APR 01 02:00 24.0257400572 -314352.885 302.5980 6.6076 159.572 30.184
2007 APR 01 02:10 24.0478764543 -317276.908 305.0950 6.4564 159.582 32.053
2007 APR 01 02:20 24.0702187639 -320228.151 307.5921 6.3056 159.591 33.901
2007 APR 01 02:30 24.0927688642 -323205.557 310.0894 6.1549 159.601 35.724
2007 APR 01 02:40 24.1155285431 -326208.006 312.5869 6.0046 159.610 37.520
2007 APR 01 02:50 24.1384995141 -329234.313 315.0845 5.8545 159.619 39.284
2007 APR 01 03:00 24.1616834153 -332283.232 317.5822 5.7047 159.629 41.011
2007 APR 01 03:10 24.1850817765 -335353.461 320.0801 5.5552 159.638 42.698
2007 APR 01 03:20 24.2086960473 -338443.640 322.5780 5.4060 159.646 44.337
2007 APR 01 03:30 24.2325275784 -341552.355 325.0761 5.2570 159.655 45.924
2007 APR 01 03:40 24.2565776188 -344678.143 327.5743 5.1083 159.664 47.451
2007 APR 01 03:50 24.2808473106 -347819.493 330.0726 4.9599 159.672 48.910
2007 APR 01 04:00 24.3053376921 -350974.849 332.5710 4.8118 159.681 50.294
2007 APR 01 04:10 24.3300496849 -354142.612 335.0695 4.6640 159.689 51.593
2007 APR 01 04:20 24.3549841034 -357321.145 337.5681 4.5164 159.697 52.798
2007 APR 01 04:30 24.3801416480 -360508.777 340.0668 4.3692 159.706 53.899
2007 APR 01 04:40 24.4055228912 -363703.804 342.5655 4.2223 159.714 54.885
2007 APR 01 04:50 24.4311282925 -366904.491 345.0643 4.0756 159.722 55.745
2007 APR 01 05:00 24.4569581912 -370109.080 347.5632 3.9292 159.730 56.470
2007 APR 01 05:10 24.4830127946 -373315.791 350.0621 3.7832 159.738 57.049
2007 APR 01 05:20 24.5092921899 -376522.825 352.5610 3.6374 159.746 57.475
2007 APR 01 05:30 24.5357963371 -379728.366 355.0600 3.4920 159.753 57.740
2007 APR 01 05:40 24.5625250635 -382930.592 357.5591 3.3468 159.761 57.841
2007 APR 01 05:50 24.5894780744 -386127.667 0.0581 3.2020 159.769 57.776
2007 APR 01 06:00 24.6166549479 -389317.756 2.5572 3.0575 159.777 57.545
2007 APR 01 06:10 24.6440551247 -392499.020 5.0563 2.9132 159.785 57.151
2007 APR 01 06:20 24.6716779257 -395669.624 7.5554 2.7693 159.792 56.601
2007 APR 01 06:30 24.6995225381 -398827.742 10.0544 2.6258 159.800 55.900
2007 APR 01 06:40 24.7275880246 -401971.556 12.5535 2.4825 159.808 55.059
2006 VV2 GOLDSTONE MASTERLOG
==============================================================================
RCV TX
setup runs start -stop osod OFFSET Poln Notes
------------------------------------------------------------------------------
March 27
CW 4 kHz, 2 hops, 10 s dwell 10 112604-113957 46 None RCP
10 usec, 127 code ncoh=1 4 115756-120301 46 +200 RCP
11 usec, 127 code ncoh=1 2 121824-122033 46 +200 RCP
1 usec, 127 code ncoh=15 7 124806-125735 46 +100 RCP
1/8 usec, 127 code ncoh=120 9 132145-133525 46 +60 RCP weak echoes
1/2 usec, 127 code ncoh= 3 140358-140735 46 +60 RCP no echoes
CW 4 kHz, 2 hops, 10 s dwell 10 141535-142928 46 None RCP
------------------------------------------------------------------------------
March 30
CW 4 KHz, nohops 30 s dwell -- 024520-040000 50 none RCP rx at DSS13 & VLBA
1/8 usec, 127 code ncoh=246 34 042717-045613 50 +60 RCP
1/8 usec, 127 code ncoh=246 77 050213-060824 50 +60 RCP
We had several bad runs from 0520-0527 due to transposed digits with pointing macro C
(runs 23-29)
chirp tests 40 MHz 29 062013-064451 50
------------------------------------------------------------------------------
April 1
1/8 usec, 127 code ncoh=246 221 011107-042618 50 +60 RCP
CW 4 KHz, nohops 30 s dwell -- ~0425??-0530?? 50 none RCP rx at DSS13 & VLBA
chirp tests 40 MHz 37 054732-063514 50
------------------------------------------------------------------------------
April 2
1/8 usec, 127 code ncoh=246 41 034554-042622 50 +60 RCP bad ME: pointing mediocre
...break to work on master equatorial...
1/8 usec, 127 code ncoh=246 113 055302-074506 50 +60,+50 rows RCP pointing good
chirp tests during postcal
------------------------------------------------------------------------------
April 3
1/8 usec, 255 code ncoh=123 142 040042-065952 50 +60 RCP
==============================================================================
RADAR ASTROMETRY
2007 03 27 12:50:00 R 42.624164 3.0 8560.D6 -14 Benner,L.A.M.
Correction of -2 usec to solution 46 from 10, 11, and 1 usec
ranging. Placed COM at TE of 1 usec echo, which is 6 rows deep.
==============================================================================
Dr. Lance A. M. Benner | PHONE: (818) 354-7412
Mail Stop 300-233 | FAX: (818) 354-9476
Jet Propulsion Laboratory | email: lance@reason.jpl.nasa.gov
Pasadena, CA 91109-8099 | Plan: To live long and prosper
http://echo.jpl.nasa.gov/asteroids/2006VV2/html/2006VV2_planning.html
Asteroid Radar Astronomy