Table 1
Observational circumstances and system parameters of the Arecibo radar observations of comet 67P/C-G.
| Date | UT | r h | Δ | α | ξ | DB | RTT | G | T | t |
| 1982 | hr min | AU | AU | deg | deg | Hz | s | dB | K | s |
|
|
||||||||||
| November 8 | 07 30 | 1.307 | 0.412 | 33.7 | 124.0 | 60,960 | 71.1 | 411.49 | 55 | 939 |
| November 9 | 07 28 | 1.307 | 0.410 | 33.5 | 124.2 | 57,807 | 71.3 | 409.34 | 47 | 3130 |
| November 10 | 07 27 | 1.306 | 0.408 | 33.2 | 124.5 | 54,628 | 71.3 | 407.30 | 50 | 3130 |
| November 11 | 07 25 | 1.306 | 0.406 | 32.9 | 124.7 | 51,480 | 71.4 | 405.38 | 43 | 1305 |
| November 12 | 07 24 | 1.306 | 0.404 | 32.6 | 125.0 | 48,303 | 71.1 | 403.58 | 51 | 2738 |
| November 13 | 07 22 | 1.306 | 0.403 | 32.3 | 125.2 | 45,155 | 71.3 | 401.89 | 46 | 2809 |
| November 14 | 07 21 | 1.306 | 0.401 | 32.0 | 125.5 | 41,978 | 71.2 | 400.31 | 51 | 3050 |
| November 15 | 07 19 | 1.307 | 0.400 | 31.7 | 125.7 | 38,830 | 71.0 | 398.85 | 55 | 3314 |
Notes. rh, Δ: heliocentric and geocentric distances. α, ξ: solar phase angle and aspect angle. DB: Doppler broadening of the echo. RTT: the round-trip time. G, T: effective antenna gain and system temperature. t: integration time.
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