2013 ET Goldstone Radar Observations Planning


Goldstone Radar Images of 2013 ET

Sequence of Goldstone radar images of 2013 ET from March 10.  The images
span interval of 1.6 hours from 01:13-02:50 UT.  Each frame has
a resolution of 3.75 m x 0.015 Hz and is an integration of 240 seconds,
but we double sampled, so each row corresponds to 1.875 meters and adjacent
rows are correlated.  Range increases down and Doppler frequency increases
to the right so rotation is counterclockwise.  The images reveal that 2013 ET is 
is an irregular and angular object with considerable structure even though it's
only a few tens of meters in diameter.


Background


2013 ET was discovered by the Catalina Sky Survey on March 3, 2013. We do not know anything about its physical characteristics 
except that its absolute magnitude of 23.1 suggests a diameer of ~75 m (within a factor of two). This asteroid will make
a very close approach (2.5 lunar distances) to Earth on March 9 when it will be an outstanding radar target at Goldstone. 
We have secured two observing tracks at Goldstone: 

March 7   0330-0940 UTC 
March 10  0020-0250 UTC

On Mar 10, we will observe in bistatic mode due to the very short round-trip-time (RTT).

Date (UT)           RA        DEC       delta (AU)      RTT(s) 
Mar 09 20:00      51.86365 -13.00653 0.00689812281034   6.88
Mar 09 21:00      49.64368 -12.54532 0.00699644908452   6.98
Mar 09 22:00      47.49608 -12.08014 0.00710488783687   7.09
Mar 09 23:00      45.42308 -11.61389 0.00722298340469   7.21
Mar 10 00:00      43.42599 -11.14918 0.00735027014259   7.34
Mar 10 01:00      41.50528 -10.68834 0.00748627907391   7.47
Mar 10 02:00      39.66069 -10.23335 0.00763054367736   7.62
Mar 10 03:00      37.89139  -9.78592 0.00778260476620   7.77

We hope to have high enough SNRs for 40 MHz chirping on March 10.  We may attempt some monostatic ranging on 
that date despite the short RTT.

The asteroid is too far south for Arecibo to observe during the closest approach and it is unlikely that any 
observations will be scheduled even after the asteroid enters Arecibo's declination window on March 11.

Optical astrometry, lightcurves, and spectroscopy are very much appreciated prior to our radar observations.

2013 ET will reach 15th magnitude and be an excellent optical target for a few days prior to the 
closest approach.  After March 10 it wlll be too close to the Sun for optical observations.

We'd like to thank the many observers who reported astrometry in response to our requests for help:
it's been invaluable!

Orbital and Physical Characteristics  
 orbit type               Apollo
 semimajor axis           1.206 AU     
 eccentricity             0.385 
 inclination              4.9 deg       
 perihelion distance      0.742 AU     
 aphelion distance        1.670 AU     
 absolute magnitude (H)   23.1
 diameter                 ~ 75 m    (assuming an optical albedo of 0.18)
 rotation period         ~2 h       (J. Pollock, pers. comm.) 
 pole direction           unknown
 lightcurve amplitude    ~1 magnitude, suggesting an elongated shape
 spectral class           unknown 

Last update: 2013 Mar 7

Discovery MPEC

M.P.E.C. 2013-E14                                Issued 2013 Mar. 4, 12:46 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://www.minorplanetcenter.net/    ISSN 1523-6714

                                    2013 ET

Observations:
     K13E00T* C2013 03 03.32425 10 19 35.07 -08 50 22.9          16.9 VuEE014703
     K13E00T  C2013 03 03.33502 10 19 30.72 -08 50 37.9          17.1 VuEE014703
     K13E00T  C2013 03 03.34072 10 19 28.41 -08 50 45.2          17.1 VuEE014703
     K13E00T  C2013 03 03.34699 10 19 25.89 -08 50 54.6          16.9 VuEE014703
     K13E00T AC2013 03 03.38872 10 19 08.31 -08 51 51.4          17.4 VuEE014H06
     K13E00T AC2013 03 03.38955 10 19 08.00 -08 51 52.9          17.4 VuEE014H06
     K13E00T AC2013 03 03.39034 10 19 07.70 -08 51 53.9          17.5 VuEE014H06
     K13E00T AC2013 03 03.39707 10 19 05.02 -08 52 02.5          17.1 VuEE014H06
     K13E00T AC2013 03 03.39786 10 19 04.72 -08 52 03.6          17.2 VuEE014H06
     K13E00T AC2013 03 03.39868 10 19 04.42 -08 52 04.9          17.2 VuEE014H06
     K13E00T IC2013 03 03.40806 10 19 00.77 -08 52 17.4          17.7 VqEE014H06
     K13E00T |C2013 03 03.41033 10 18 59.88 -08 52 20.1          17.5 VcEE014H06
     K13E00T  C2013 03 03.41108 10 19 00.30 -08 52 22.1          17.3 VuEE014703
     K13E00T |C2013 03 03.41178 10 18 59.30 -08 52 22.3          17.4 VcEE014H06
     K13E00T  C2013 03 03.41223 10 18 59.79 -08 52 23.1          17.2 VuEE014703
     K13E00T |C2013 03 03.41322 10 18 58.71 -08 52 24.6          17.3 VcEE014H06
     K13E00T  C2013 03 03.41338 10 18 59.40 -08 52 24.5          17.4 VuEE014703
     K13E00T  C2013 03 03.41454 10 18 58.89 -08 52 26.4          17.3 VuEE014703
     K13E00T IC2013 03 03.42784 10 18 53.07 -08 52 44.0          17.7 VqEE014H06
     K13E00T IC2013 03 03.44756 10 18 45.59 -08 53 09.4          16.5 VqEE014H06
     K13E00T  C2013 03 03.67706 10 17 29.22 -08 59 18.2          16.9 RoEE014300
     K13E00T  C2013 03 03.67834 10 17 28.64 -08 59 20.2          16.9 RoEE014300
     K13E00T  C2013 03 03.67962 10 17 28.07 -08 59 22.1          17.0 RoEE014300
     K13E00T  C2013 03 03.68090 10 17 27.51 -08 59 23.8          17.0 RoEE014300
     K13E00T  C2013 03 03.68218 10 17 26.95 -08 59 25.9          17.0 RoEE014300
     K13E00T  C2013 03 03.68346 10 17 26.40 -08 59 27.7          17.0 RoEE014300
     K13E00T  C2013 03 03.68474 10 17 25.83 -08 59 29.6          17.1 RoEE014300
     K13E00T KC2013 03 03.81294 10 16 50.44 -09 03 25.9          17.2 VqEE014198
     K13E00T KC2013 03 03.81550 10 16 49.30 -09 03 30.1          17.1 VqEE014198
     K13E00T KC2013 03 03.81732 10 16 48.55 -09 03 33.2          17.1 VqEE014198
     K13E00T KC2013 03 03.82462 10 16 45.42 -09 03 46.2          17.1 VqEE014198
     K13E00T KC2013 03 03.82583 10 16 44.88 -09 03 48.0          17.0 VqEE014198
     K13E00T KC2013 03 03.83023 10 16 42.97 -09 03 55.8          17.0 VqEE014198
     K13E00T KC2013 03 03.83211 10 16 42.17 -09 03 59.2          16.9 VqEE014198
     K13E00T KC2013 03 03.83457 10 16 41.10 -09 04 03.5          16.9 VqEE014198
     K13E00T KC2013 03 03.84536 10 16 35.30 -09 04 29.9          17.1 VqEE014C43
     K13E00T KC2013 03 03.84797 10 16 34.13 -09 04 34.4          17.3 VqEE014C43
     K13E00T KC2013 03 03.84953 10 16 33.46 -09 04 37.1          17.0 VqEE014C43
     K13E00T KC2013 03 03.84980 10 16 33.35 -09 04 37.5          16.9 VqEE014C43
     K13E00T KC2013 03 03.85178 10 16 32.49 -09 04 41.4          17.3 VqEE014C43
     K13E00T KC2013 03 03.85981 10 16 31.88 -09 04 33.7          17.4 RuEE014958
     K13E00T KC2013 03 03.86431 10 16 29.86 -09 04 42.1          17.2 RuEE014958
     K13E00T KC2013 03 03.86890 10 16 27.86 -09 04 50.6          17.3 RuEE014958
     K13E00T KC2013 03 03.87336 10 16 25.86 -09 04 58.5          17.1 RuEE014958
     K13E00T KC2013 03 03.87820 10 16 23.66 -09 05 07.3          16.8 RuEE014958
     K13E00T KC2013 03 03.88273 10 16 21.61 -09 05 15.2          16.8 RuEE014958
     K13E00T KC2013 03 03.88550 10 16 17.32 -09 05 40.3          17.2 VqEE014C43
     K13E00T KC2013 03 03.88567 10 16 20.14 -09 05 22.4          17.2 VuEE014I93
     K13E00T KC2013 03 03.88774 10 16 16.34 -09 05 43.6          17.5 VqEE014C43
     K13E00T KC2013 03 03.88981 10 16 15.44 -09 05 47.3          17.2 VqEE014C43
     K13E00T KC2013 03 03.89248 10 16 17.06 -09 05 34.5          17.5 VuEE014I93
     K13E00T KC2013 03 03.89697 10 16 14.50 -09 05 57.3                qEE014J95
     K13E00T KC2013 03 03.89910 10 16 14.03 -09 05 46.2          17.2 VuEE014I93
     K13E00T KC2013 03 03.90037 10 16 12.97 -09 06 03.5                qEE014J95
     K13E00T KC2013 03 03.90377 10 16 11.44 -09 06 09.4          16.9 RqEE014J95
     K13E00T KC2013 03 03.90804 10 16 08.57 -09 06 03.2          16.5 VoEE014C77
     K13E00T KC2013 03 03.91056 10 16 07.41 -09 06 07.5          16.6 VoEE014C77
     K13E00T KC2013 03 03.91294 10 16 06.27 -09 06 11.6          16.7 VoEE014C77
     K13E00T KC2013 03 03.91506 10 16 05.29 -09 06 15.1          16.2 VoEE014C77
     K13E00T  C2013 03 03.91980 10 16 01.80 -09 06 27.8          16.3 RrEE014106
     K13E00T  C2013 03 03.93433 10 15 54.95 -09 06 52.9          16.7 RrEE014106
     K13E00T  C2013 03 03.94858 10 15 48.22 -09 07 17.1          16.0 RrEE014106
     K13E00T KC2013 03 03.95192 10 15 47.65 -09 07 21.1          16.1 RcEE014A24
     K13E00T KC2013 03 03.95340 10 15 46.92 -09 07 24.1          15.9 RcEE014A24
     K13E00T KC2013 03 03.95470 10 15 46.20 -09 07 26.2          16.4 RcEE014A24
     K13E00T  C2013 03 03.96282 10 15 41.44 -09 07 41.5          16.3 RrEE014106
     K13E00T KC2013 03 03.96874 10 15 39.79 -09 07 48.4          17.4 VuEE014K33
     K13E00T KC2013 03 03.98509 10 15 31.98 -09 08 16.4          17.0 VuEE014K33
     K13E00T KC2013 03 03.99320 10 15 28.15 -09 08 30.9          17.1 VuEE014K33
     K13E00T |C2013 03 04.02219 10 15 29.54 -09 04 41.8          17.4 VuEE014807
     K13E00T |C2013 03 04.02441 10 15 28.50 -09 04 46.0          17.3 VuEE014807
     K13E00T KC2013 03 04.02586 10 15 12.23 -09 09 29.3                tEE014204
     K13E00T |C2013 03 04.02691 10 15 27.34 -09 04 50.7          17.2 VuEE014807
     K13E00T KC2013 03 04.02809 10 15 11.17 -09 09 33.0                tEE014204
     K13E00T KC2013 03 04.03035 10 15 10.07 -09 09 37.0          16.4 RtEE014204
     K13E00T KC2013 03 04.03225 10 15 09.17 -09 09 40.1                tEE014204
     K13E00T KC2013 03 04.03409 10 15 08.28 -09 09 43.2                tEE014204
     K13E00T |C2013 03 04.03434 10 15 23.85 -09 05 04.6          17.0 VuEE014807
     K13E00T |C2013 03 04.03657 10 15 22.80 -09 05 08.7          17.1 VuEE014807
     K13E00T  C2013 03 04.10439 10 14 35.99 -09 11 54.9          16.1 RqEE014C23
     K13E00T  C2013 03 04.10583 10 14 35.42 -09 11 57.2          15.7 RqEE014C23
     K13E00T  C2013 03 04.10727 10 14 34.70 -09 12 00.1          15.9 RqEE014C23
     K13E00T  C2013 03 04.10872 10 14 33.83 -09 12 01.9          15.5 RqEE014C23
     K13E00T KC2013 03 04.11278910 14 47.85 -09 11 44.5          16.7 VuEE014H21
     K13E00T KC2013 03 04.11633610 14 46.11 -09 11 51.4          16.8 VuEE014H21
     K13E00T KC2013 03 04.12051810 14 44.04 -09 11 59.5          16.9 VuEE014H21
     K13E00T $C2013 03 04.41935 10 12 19.29 -09 20 32.2          16.9 RoEE014F65
     K13E00T $C2013 03 04.42270 10 12 17.36 -09 20 38.6          16.6 RoEE014F65
     K13E00T $C2013 03 04.42599 10 12 15.43 -09 20 45.3          16.6 RoEE014F65

Observer details:
106 Crni Vrh.  Observer B. Mikuz.  0.6-m f/3.3 Deltagraph + CCD.
198 Wildberg.  Observer R. Apitzsch.  0.35-m f/3.1 reflector + CCD.
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.60-m f/4.64 reflector
    + CCD.
300 Bisei Spaceguard Center--BATTeRS.  Observers K. Nishiyama, T. Sakamoto.
    1.0-m f/3.0 reflector + CCD.
703 Catalina Sky Survey.  Observer R. E. Hill.  Measurers A. Boattini,
    E. J. Christensen, A. R. Gibbs, A. D. Grauer, R. E. Hill, J. A. Johnson,
    R. A. Kowalski, S. M. Larson, R. H. McNaught, F. C. Shelly.  0.68-m
    Schmidt + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes, H. Tanquary.  0.41-m f/11
    Ritchey-Chretien + CCD.
958 Observatoire de Dax.  Observers P. Dupouy, J. B. de Vanssay, G. Soulie.
    Measurer P. Dupouy.  0.43-m f/2.7 reflector + CCD.
A24 New Millennium Observatory, Mozzate.  Observer E. Cozzi.  0.36-m f/11
    Schmidt-Cassegrain + CCD.
C23 Olmen.  Observer A. Diepvens.  0.20-m f/9 refractor + CCD.
C43 Hoyerswerda.  Observer P. Lindner.  0.30-m f/6.3 Schmidt-Cassegrain + CCD.
C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4 reflector + CCD.
F65 Haleakala-Faulkes Telescope North.  Observers K. Rochowicz, E. Guido,
    N. Howes.  2.0-m f/10.0 Ritchey-Chretien + CCD.
H06 iTelescope Observatory, Mayhill.  Observers M. Urbanik, H. Sato, J. Jahn.
    0.25-m f/3.4 reflector + CCD, 0.43-m f/6.8 astrograph + CCD + f/4.5 focal
    reducer.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers L. Buzzi, H. Devore, S. Foglia, T. Vorobjov.  0.61-m f/4.5
    astrograph + CCD.
I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
    + CCD.
K33 San Defendente.  Observer E. Viano.  0.20-m f/10 Schmidt-Cassegrain + CCD
    + f/6.3 focal reducer.

Orbital elements:
2013 ET                                                  Earth MOID = 0.0042 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5                 MPC
M 346.44314              (2000.0)            P               Q
n   0.74389920     Peri.   81.86024     -0.28829794     +0.95745627
a   1.2063129      Node   171.35175     -0.90846931     -0.26930146
e   0.3847511      Incl.    4.85238     -0.30260174     -0.10370250
P   1.32           H   23.1           G   0.15           U   7
Residuals in seconds of arc
130303 703  0.4+  0.0     130303 198  0.3+  0.2-    130303 106  0.1-  0.2-
130303 703  0.2+  0.0     130303 198  0.0   0.2+    130303 106  0.0   0.1+
130303 703  0.0   0.6+    130303 198  0.1-  0.1+    130303 A24  0.9+  1.3+
130303 703  0.1+  0.1-    130303 198  0.1+  0.0     130303 A24  0.5+  0.8+
130303 H06  0.6-  0.0     130303 198  0.1+  0.1+    130303 A24  1.0-  1.0+
130303 H06  0.3-  0.3-    130303 C43  0.2+  0.1-    130303 106  0.2-  0.0
130303 H06  0.1-  0.3-    130303 C43  0.1-  0.0     130303 K33  0.7-  0.0
130303 H06  0.6-  0.2+    130303 C43  0.2+  0.0     130303 K33  0.1-  0.1+
130303 H06  0.5-  0.1+    130303 C43  0.4+  0.1+    130303 K33  1.0+  0.6-
130303 H06  0.1-  0.1-    130303 C43  0.6+  0.4-    130304 807  0.2+  0.1+
130303 H06  0.2+  0.0     130303 958  1.1-  0.2+    130304 807  0.1+  0.1+
130303 H06  0.1+  0.3+    130303 958  1.4-  0.1-    130304 204  0.1-  0.1-
130303 703  0.4+  0.3-    130303 958  0.8-  0.4-    130304 807  0.2+  0.0
130303 H06  0.1-  0.0     130303 958  0.8-  0.4-    130304 204  0.1+  0.1-
130303 703  0.4-  0.3+    130303 958  1.2-  0.5-    130304 204  0.2-  0.2-
130303 H06  0.5-  0.3-    130303 958  1.3-  0.4-    130304 204  0.0   0.1-
130303 703  0.5+  0.4+    130303 C43  0.2-  0.5-    130304 204  0.1-  0.1-
130303 703  0.3-  0.1+    130303 I93  0.0   0.0     130304 807  0.1+  0.1+
130303 H06  0.1-  0.2-    130303 C43  0.4+  0.1+    130304 807  0.1+  0.2+
130303 H06  0.9+  0.6+    130303 C43  1.0+  0.0     130304 C23  0.8-  0.2-
130303 300  0.4+  0.0     130303 I93  0.2+  0.0     130304 C23  0.8+  0.0
130303 300  0.2+  0.1-    130303 J95  0.0   0.0     130304 C23  0.1+  0.5-
130303 300  0.1+  0.0     130303 I93  0.2+  0.0     130304 C23 (2.7-  0.2+)
130303 300  0.1+  0.2+    130303 J95  0.1+  0.1-    130304 H21  0.1+  0.0
130303 300  0.2+  0.0     130303 J95  0.1+  0.0     130304 H21  0.1+  0.0
130303 300  0.4+  0.1+    130303 C77  0.1+  0.2-    130304 H21  0.1-  0.1-
130303 300  0.3+  0.2+    130303 C77  0.3+  0.1-    130304 F65  0.2-  0.2+
130303 198  0.5+  0.5-    130303 C77  0.2-  0.0     130304 F65  0.1+  0.5+
130303 198  0.2-  0.2-    130303 C77  0.0   0.2+    130304 F65  0.1-  0.2+
130303 198  0.2+  0.1-    130303 106  0.1+  0.1-

Ephemeris:
2013 ET                  a,e,i = 1.21, 0.38, 5                   q = 0.7422
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
2013 02 02    10 43 35.4 -04 32 13   0.2659  1.2173   147.1    26.1    21.8
...
2013 02 17    10 43 12.7 -06 24 47   0.1453  1.1249   158.9    18.5    20.1
...
2013 02 25    10 36 58.0 -07 23 12   0.08701 1.0735   163.4    15.3    18.8
...
2013 03 03    10 21 19.5 -08 40 50   0.04520 1.0345   162.3    17.0    17.3
2013 03 04    10 15 28.1 -09 05 38   0.03837 1.0279   161.0    18.3    17.0
2013 03 05    10 07 05.7 -09 39 32   0.03160 1.0214   159.0    20.3    16.7
...
2013 03 11    00 57 01.6 -03 00 04   0.01214 0.9823    23.1   156.7    23.4
...
2013 03 19    23 14 29.5 +04 53 28   0.06589 0.9310    11.3   167.9    32.1
...
2013 04 03    23 06 22.4 +05 30 17   0.1779  0.8426    25.5   149.3    27.3

A. U. Tomatic                (C) Copyright 2013 MPC           M.P.E.C. 2013-E14


SNR Calculation

Target Name:   2013 ET

D = 0.075 km  
Period = 0.5 h  (we assume a relatively rapid rotation in order to estimate conservative SNRs)  
OC albedo = 0.1
    
                UT                            #                 max
 start date    window      RA, dec   dist   runs        SNR   SNR/run
2013 Mar  5  03:16-10:43    151, -10  0.030     482         22         1
2013 Mar  6  03:02-10:19    147, -11  0.023     601         58         3
2013 Mar  7  02:40-09:40    141, -12  0.017     786        190         8 
2013 Mar  8  01:58-08:22    127, -15  0.011    1088        890        30
2013 Mar  9  00:10-05:43     94, -18  0.007    1491       4000       120        bistatic SNR
2013 Mar  9  20:28-02:54     44, -11  0.007    1607       3900       110          ~25
2013 Mar 10  17:46-01:37     16,  -4  0.012    1219        850        27
2013 Mar 11  16:34-01:03      4,   0  0.017     886        190         7
2013 Mar 12  15:58-00:43    359,  +2  0.024     680         58         2
2013 Mar 13  15:36-00:30    355,  +3  0.030     547         23         1

Goldstone SNRs assume Ptx = 435 kW 


Arecibo SNRs  : Tsys = 23.0 K,  P = 800 kW,  elev >= 70.31 deg 

                 UT                              #                 max
 start date    window       RA, dec   dist    runs        SNR   SNR/run
2013 Mar 11  17:06-17:58     5,   0  0.017      93       1200       130
2013 Mar 12  16:20-17:45   359,  +2  0.023     111        530        56
2013 Mar 13  15:55-17:33   356,  +3  0.029      98        240        27
2013 Mar 14  15:38-17:24   353,  +4  0.036      85        120        14
2013 Mar 15  15:25-17:16   352,  +4  0.043      76         61         8
2013 Mar 16  15:15-17:09   351,  +4  0.050      67         35         5
2013 Mar 17  15:07-17:02   350,  +5  0.057      60         22         3
2013 Mar 18  14:59-16:56   349,  +5  0.064      54         14         2

Track Assignments


Goldstone tracks:

*DAY START BOT  EOT  END FACILITY USER   ACTIVITY        
 066 0300 0430 0940 1010  DSS-14  GSSR   AST 2013 ET     
 069 0020 0150 0250 0320  DSS-13  GSSR   AST 2013 ET     
 069 0020 0150 0250 0320  DSS-14  GSSR   AST 2013 ET     

         UT         UT          PST               AST               Duration    Round-trip     
 DOY     Date       TX Window   TX Window         TX Window           hh:mm     time (sec)     SNR/Run 
 ---     ----       ---------   ---------         ---------          ---------    ---------     -------
 066     Mar  7     0330-0940   1930-0140 Mar 6/7 2330-0540 Mar 6/7    6:10       16.7            8   (monostatic) 
 069     Mar 10     0020-0250   1620-1850 Mar 9   2020-2250 Mar 9      2:30        7.5          ~25   (bistatic)
 
NOTE: TXON is shown at the earliest time, which is only 30 min into the precal time.


Uncertainties

From Jon Giorgini, 2013 Mar 7:

The optical measurement dataset more than doubled last night,
so folding that in (426 measurements, Mar 3-6), plus three delays
and two Dopplers from DSS-14, orbit solution #19 was estimated.

Prior solution files were moved to the /OLD subdirectory.

Formal 3-sigma X-band uncertainties:

 Date__(UT)__HR:MN  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2013-Mar-10 00:00       2.996         4.86       0.000115
 2013-Mar-10 01:00       2.964         4.59       0.000117
 2013-Mar-10 02:00       2.932         4.34       0.000118
 2013-Mar-10 03:00       2.901         4.10       0.000119

- - - - - - - - - - - - - - - - - - - - 

From Jon Giorgini, 2013 Mar 6:

Incorporating the recent optical measurements, now 197 in total,
spanning  Mar 3-6, 2013 ET orbit solution #7 was estimated.

Formal 3-sigma S-band uncertainties now look accaeptable for 
tonight.  Below, they are tabulated at 1 hour intervals over the
track.

 Date__(UT)__HR:MN  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2013-Mar-07 03:00       4.887      1261.96       0.033835
 2013-Mar-07 04:00       5.258      1258.63       0.033319
 2013-Mar-07 05:00       5.660      1255.15       0.032805
 2013-Mar-07 06:00       6.098      1251.52       0.032293
 2013-Mar-07 07:00       6.575      1247.71       0.031782
 2013-Mar-07 08:00       7.090      1243.72       0.031273
 2013-Mar-07 09:00       7.642      1239.54       0.030766
 2013-Mar-07 10:00       8.231      1235.14       0.030262

 Date__(UT)__HR:MN  POS_3sigma   DOP_X_3sig  RT_delay_3sig
 2013-Mar-10 00:00     183.629       911.20       0.014628
 2013-Mar-10 01:00     179.896       928.76       0.014952
 2013-Mar-10 02:00     175.889       944.52       0.015292
 2013-Mar-10 03:00     171.696       959.00       0.015647

Predicts have been extended to the earlier date and updated
to the current orbit solution.

- - - - - - - - - - 

From Horizons, 2013 Mar 06, Solution #5 (# obs: 198, 3 days)
 
 Date__(UT)__HR:MN     R.A._(J2000.0)_DEC.            delta POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2013-Mar-06 00:00 *   148.62204 -10.54018 0.02489836969570      0.750      361.20     1312.76       0.048110
 2013-Mar-07 00:00 *   143.06758 -11.88975 0.01836357606816      3.903      349.12     1268.85       0.035331
 2013-Mar-08 00:00 *   131.52884 -14.28021 0.01219779586683     22.170      313.22     1138.38       0.023436
 2013-Mar-09 00:00 *   100.78057 -17.62332 0.00736655474260    113.335      175.14      636.55       0.014285
 2013-Mar-10 00:00 *m   43.42756 -11.39870 0.00731621376720    183.593      250.35      909.87       0.014601
 2013-Mar-11 00:00 *m   14.13244  -3.11449 0.01210558226879     97.553      327.92     1191.80       0.024972
 2013-Mar-12 00:00 *m    3.04087   0.41008 0.01825992655990     58.672      353.34     1284.20       0.037389
 2013-Mar-13 00:00 *m  357.64791   2.12228 0.02478978060356     41.744      363.33     1320.50       0.050384
 2013-Mar-14 00:00 *m  354.51372   3.10299 0.03147216539647     32.905      368.58     1339.58       0.063645
 2013-Mar-15 00:00 *m  352.47818   3.72899 0.03823868037939     27.629      372.11     1352.41       0.077067

Plane-of-sky pointing uncertainties are in excellent shape and are easily small enough for
us to point.  The Doppler and time delay uncertainties are still large but manageable.

- - - - - - - - - - - - - - - - - - - - 

From the JPL Horizons on-line database, 2013-Mar-05, Solution #4, # obs: 114 (2 days)
 Date__(UT)__HR:MN     POS_3sigma  DOP_S_3sig  DOP_X_3sig  RT_delay_3sig
 2013-Mar-05 00:00          1.668      926.70     3368.06       0.129541
 2013-Mar-06 00:00         11.260      912.74     3317.33       0.098314
 2013-Mar-07 00:00         53.315      876.63     3186.08       0.069801
 2013-Mar-08 00:00        229.339      739.05     2686.06       0.047630
 2013-Mar-09 00:00       1015.687      595.46     2164.17       0.031898
 2013-Mar-10 00:00       1506.910     1496.28     5438.16       0.040718
 2013-Mar-11 00:00        759.946     1051.96     3823.29       0.083956
 2013-Mar-12 00:00        439.143      966.70     3513.41       0.119928
 2013-Mar-13 00:00        302.206      951.36     3457.67       0.154235
 2013-Mar-14 00:00        231.441      949.33     3450.29       0.188301
 2013-Mar-15 00:00        189.425      951.19     3457.04       0.222442
 2013-Mar-16 00:00        161.952      954.73     3469.93       0.256749

- - - - - - - - - - 

From Jon Giorgini, Mar 4:

With 89 optical measurements so far (Mar 3-4 2013), 2013 ET
orbit solution #3 was estimated. OSOD w/nominal predicts was
established on aardvark in the /2013et sub-directory.

Formal 3-sigma X-band uncertainties at 30 minute intervals
during the track assigned so far:

Date__(UT)__HR:MN  POS_3sigma   DOP_X_3sig  RT_delay_3sig
2013-Mar-09 00:00    3060.962      7138.78       0.079406
2013-Mar-09 00:30    3144.439      7548.28       0.077913
2013-Mar-09 01:00    3228.524      7962.92       0.076343
2013-Mar-09 01:30    3312.968      8380.24       0.074697
2013-Mar-09 02:00    3397.503      8797.70       0.072975
2013-Mar-09 02:30    3481.849      9212.76       0.071180
2013-Mar-09 03:00    3565.714      9622.90       0.069314

Pointing knowledge is not currently good enough to support the track.

**********************************************************************************************

Apparent Magnitudes, Solar Elongations, Lunar Elongations, and Lunar Illumination:

 Date__(UT)__HR:MN     R.A._(J2000.0)_DEC.  APmag            delta     S-O-T /r  T-O-M/Illu%
 2013-Mar-05 00:00     151.77169  -9.65922  16.65 0.03158351459976  159.0230 /T   98.4/ 49.1
 2013-Mar-06 00:00     148.54196 -10.48771  16.22 0.02489710976452  155.8077 /T  114.5/ 37.8
 2013-Mar-07 00:00     142.95565 -11.81716  15.71 0.01836172181447  150.1686 /T  131.5/ 27.1
 2013-Mar-08 00:00     131.35560 -14.16441  15.14 0.01219878715178  138.5705 /T  147.6/ 17.6
 2013-Mar-09 00:00     100.53380 -17.39097  14.91 0.00738103988204  108.6779 /T  136.2/  9.9
 2013-Mar-10 00:00      43.42599 -11.14918   n.a. 0.00735027014259   53.0863 /T   75.5/  4.2
 2013-Mar-11 00:00      14.21525  -2.98628   n.a. 0.01214193096528   23.0168 /T   34.4/  1.0
 2013-Mar-12 00:00       3.11406   0.48957   n.a. 0.01829713192406   11.6870 /T   10.7/  0.2
 2013-Mar-13 00:00     357.70788   2.17931   n.a. 0.02482881143817    7.0051 /T  8.039/  1.7
 2013-Mar-14 00:00     354.56365   3.14739   n.a. 0.03151363509773    5.8074 /T   23.6/  5.3

Setups


With a rotation period of about 2 hours, we're expecting a bandwidth of roughly 2-5 Hz.

For the March 7 track, we're going to start with unhopped CW using a wide bandwidth due to the
large Doppler uncertainties, update the ephemeris, do more CW to 
verify the new solution, and then proceed to 10, 11, and 1 us ranging. 
Depending on the on SNRs, we may try 1/8 usec coarse imaging. 

TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hops 
Bandwidth:                8000 Hz
TX Offset:               + 1kHz 
Sampling interval:        1250 x 0.1 usec
VME FFT for PSD files:    8192 for 0.98-Hz resolution 

Once we improve the solution, we'll switch to:

TX polarization           RCP
RCV polarization          LCP & RCP
Frequency hops:           no hops                
Bandwidth:                4000 Hz
TX Offset:               + 0.5 kHz 
Sampling interval:        2500 x 0.1 usec
VME FFT for PSD files:    4096 for 0.98-Hz resolution 

Ranging setups:
---------------------------------------------------------------------------
10-usec
baud             10 usec
code            127
PRP            1270 usec
FFT             128   
ncoh              1 
bandwidth       787 Hz   
resolution      6.15 Hz
TXOFF          +100Hz  (echo in bin 64+16=80)
---------------------------------------------------------------------------
11-usec 
baud             11 usec
code            127
PRP            1397 usec
FFT             128  
ncoh              1 
bandwidth       716 Hz   
resolution      5.6 Hz
TXOFF          +100 Hz  (echo in bin 64+18=82) 
-------------------------------------------------------------------------
1-usec 
baud            1 usec
code            255
FFT             128
ncoh             6
bandwidth        654 Hz   
resolution       5.1 Hz
TXOFF           +80 Hz -> echo would be centered at 64 + 16 = 80

We're going to attempt 20 MHz chirping on Mar 9/10 track.  
If the SNRs are sufficiently strong, we hope to try 40 MHz chirping. 

20 MHz chirp:
-------------
sample clock at 40 MHz, prp 50 us, offset +40 Hz, 2000 bins in delay, FFT=500, ncoh=40  (0.025usx1 Hz)

40 MHz chirp:
-------------
sample clock at 40 MHz, prp 50 us, offset +40 Hz, 2000 bins in delay, FFT=500, ncoh=40  (0.025usx1 Hz)


_____________________________________________________________________
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 
____________________________________________________________________


Instructions

NOTE: Data should be moved to the appropriate subdirectories in aardvark:/export/data0/2013ET/raw/

2013 ET POINTING:

  OSOD and predicts are aardvark:

monostatic:
/export/data3/osod/ops/2013et/PRDX.OUT.14v-14-14.s19
                              /PUNCH.OUT.14v-14-14.s19
                              /EPH.OUT.s19

bistatic:
/export/data3/osod/ops/2013et/PRDX.OUT.14v-13-13.s19
                              /PUNCH.OUT.14v-13-13.s19


POINTING 
                                                          TX Offsets    
Date (UTC)   DOY  hhmmss    RA        Dec         Macro   LHA     Dec    RTT    OSOD
POINTING
2013 03 09   069  230000   45.6823 -11.8240         A                    7.2    s19
2013 03 10   069  000000   43.6015 -11.3518         A     4.10    1.00   7.3
2013 03 10   069  010000   41.6036 -10.8789         AB                   7.4
2013 03 10   069  020000   39.6949 -10.4088          B    3.90    1.00   7.6
2013 03 10   069  030000   37.8793 -9.94440          B                   7.7


2013 03 07   066  030000    142.2205 -12.1964      A                     17.5   s7
2013 03 07   066  040000    141.8466 -12.2800      A                     17.2
2013 03 07   066  050000    141.4561 -12.3642      A      1.9   -0.4     17.0
2013 03 07   066  060000    141.0502 -12.4489      AB                    16.7
2013 03 07   066  070000    140.6308 -12.5338      AB                    16.4
2013 03 07   066  080000    140.1994 -12.6189       B     1.9   -0.4     16.2
2013 03 07   066  090000    139.7581 -12.7044       B                    15.9
2013 03 07   066  100000    139.3083 -12.7905       B                    15.7

Transmit offsets are given in millidegrees.  

DSS-13 Pointing

 Date (UTC)   DOY  hhmmss     RA        DEC    OSOD
 2013 MAR 10  069  000000   43.601  -11.3510   s19
 2013 MAR 10  069  010000   41.603  -10.8782
 2013 MAR 10  069  020000   39.694  -10.4080
 2013 MAR 10  069  030000   37.879   -9.9436




PRDX.OUT.14f-14-14.s19 TRANSMITTER: STATION #14, RECEIVER: STATION #14 RECEIVER U.T. RANGE DOPPLER LHA DEC RA EL 2013 MAR 10 00:20 7.3482860305 -323638.987 13.0338 -11.1941 42.926 41.778 2013 MAR 10 00:30 7.3711299385 -328165.975 15.8748 -11.1152 42.592 41.097 2013 MAR 10 00:40 7.3942894689 -332644.349 18.7135 -11.0364 42.260 40.282 2013 MAR 10 00:50 7.4177611244 -337071.424 21.5497 -10.9576 41.931 39.339 2013 MAR 10 01:00 7.4415412166 -341444.593 24.3835 -10.8789 41.604 38.275 2013 MAR 10 01:10 7.4656258719 -345761.331 27.2148 -10.8003 41.279 37.100 2013 MAR 10 01:20 7.4900110554 -350019.198 30.0436 -10.7218 40.957 35.819 2013 MAR 10 01:30 7.5146925532 -354215.851 32.8698 -10.6433 40.638 34.442 2013 MAR 10 01:40 7.5396659975 -358349.044 35.6936 -10.5650 40.321 32.976 2013 MAR 10 01:50 7.5649268675 -362416.632 38.5147 -10.4868 40.007 31.429 2013 MAR 10 02:00 7.5904704903 -366416.582 41.3333 -10.4088 39.695 29.806 2013 MAR 10 02:10 7.6162920527 -370346.973 44.1493 -10.3309 39.386 28.116 2013 MAR 10 02:20 7.6423866196 -374205.996 46.9627 -10.2532 39.079 26.364 2013 MAR 10 02:30 7.6687491317 -377991.965 49.7734 -10.1757 38.775 24.555 2013 MAR 10 02:40 7.6953744067 -381703.317 52.5816 -10.0984 38.474 22.695 2013 MAR 10 02:50 7.7222571666 -385338.615 55.3871 -10.0213 38.175 20.790 PRDX.OUT.14f-14-14.s7 2013 MAR 07 03:00 17.5059831354 645550.418 310.8918 -12.1964 142.221 23.512 2013 MAR 07 03:10 17.4607659906 644639.668 313.4598 -12.2103 142.159 25.165 2013 MAR 07 03:20 17.4156138701 643695.213 316.0283 -12.2242 142.098 26.770 2013 MAR 07 03:30 17.3705290961 642718.386 318.5972 -12.2381 142.036 28.324 2013 MAR 07 03:40 17.3255138829 641710.582 321.1666 -12.2520 141.973 29.821 2013 MAR 07 03:50 17.2805703571 640673.255 323.7365 -12.2660 141.910 31.257 2013 MAR 07 04:00 17.2357005293 639607.918 326.3068 -12.2800 141.847 32.628 2013 MAR 07 04:10 17.1909063140 638516.136 328.8776 -12.2940 141.783 33.928 2013 MAR 07 04:20 17.1461894972 637399.527 331.4489 -12.3080 141.718 35.153 2013 MAR 07 04:30 17.1015517794 636259.754 334.0206 -12.3220 141.653 36.295 2013 MAR 07 04:40 17.0569947070 635098.527 336.5928 -12.3361 141.588 37.351 2013 MAR 07 04:50 17.0125197295 633917.593 339.1654 -12.3501 141.522 38.315 2013 MAR 07 05:00 16.9681281691 632718.741 341.7384 -12.3642 141.456 39.180 2013 MAR 07 05:10 16.9238212145 631503.790 344.3119 -12.3783 141.389 39.942 2013 MAR 07 05:20 16.8795999330 630274.591 346.8858 -12.3924 141.322 40.596 2013 MAR 07 05:30 16.8354652567 629033.019 349.4601 -12.4065 141.255 41.138 2013 MAR 07 05:40 16.7914179771 627780.973 352.0348 -12.4206 141.187 41.563 2013 MAR 07 05:50 16.7474587703 626520.371 354.6099 -12.4347 141.119 41.868 2013 MAR 07 06:00 16.7035881716 625253.143 357.1853 -12.4489 141.050 42.051 2013 MAR 07 06:10 16.6598065703 623981.231 359.7612 -12.4630 140.981 42.111 2013 MAR 07 06:20 16.6161142304 622706.584 2.3374 -12.4771 140.912 42.046 2013 MAR 07 06:30 16.5725112765 621431.152 4.9140 -12.4913 140.842 41.857 2013 MAR 07 06:40 16.5289976836 620156.884 7.4910 -12.5054 140.772 41.547 2013 MAR 07 06:50 16.4855733135 618885.724 10.0683 -12.5196 140.702 41.116 2013 MAR 07 07:00 16.4422378847 617619.605 12.6459 -12.5338 140.631 40.569 2013 MAR 07 07:10 16.3989909672 616360.448 15.2238 -12.5479 140.560 39.908 2013 MAR 07 07:20 16.3558320000 615110.153 17.8021 -12.5621 140.488 39.139 2013 MAR 07 07:30 16.3127603147 613870.602 20.3807 -12.5763 140.416 38.266 2013 MAR 07 07:40 16.2697750805 612643.649 22.9596 -12.5905 140.344 37.295 2013 MAR 07 07:50 16.2268753545 611431.120 25.5388 -12.6047 140.272 36.230 2013 MAR 07 08:00 16.1840600587 610234.805 28.1183 -12.6189 140.199 35.079 2013 MAR 07 08:10 16.1413279937 609056.460 30.6980 -12.6331 140.127 33.845 2013 MAR 07 08:20 16.0986778462 607897.797 33.2781 -12.6474 140.053 32.534 2013 MAR 07 08:30 16.0561081767 606760.487 35.8583 -12.6616 139.980 31.152 2013 MAR 07 08:40 16.0136174273 605646.151 38.4389 -12.6759 139.906 29.703 2013 MAR 07 08:50 15.9712039316 604556.357 41.0197 -12.6901 139.832 28.193 2013 MAR 07 09:00 15.9288659243 603492.622 43.6007 -12.7044 139.758 26.626 2013 MAR 07 09:10 15.8866015202 602456.402 46.1820 -12.7187 139.684 25.007 2013 MAR 07 09:20 15.8444087458 601449.094 48.7635 -12.7330 139.609 23.339 2013 MAR 07 09:30 15.8022855234 600472.029 51.3452 -12.7473 139.534 21.626 2013 MAR 07 09:40 15.7602296821 599526.473 53.9271 -12.7617 139.459 19.871 2013 MAR 07 09:50 15.7182389828 598613.622 56.5092 -12.7761 139.384 18.079 2013 MAR 07 10:00 15.6763110926 597734.599 59.0916 -12.7905 139.308 16.252

2013 ET 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 183-610 | 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/2013ET/2013ET_planning.html

Asteroid Radar Astronomy
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