Time Line for Magellan BSR 9 Nov 1993 Orbits 9846-9848 ERT/UTC Activity 073000 Begin Track DSS 63 074500 Station reports pre-cal Tsys values and reports Tload=7.8C 080500 NOPE advises that direct communication with MGN TRK is OK (not necessary to work through MGN ACE) 085148 Begin star cal; receivers out of lock 090500 1 V rms levels set; 15 dB attenuation added 091400 Station confirms CONSCAN OFF 091722 DSP recording starts 091844 Station reports spectrum plot taken 091922 Begin spacecraft turn toward Venus 092100 Begin switch to ambient load(s) 092300 Antenna resumes looking at sky 092500 Attenuation reduced 15 dB 092500 Station reports Tload=8.6C 092522 Spacecraft begins tracking specular point 093500 Echo visible in SSI display (Channel A, X-RCP) 093800 Switch SSI to Channel B 094000 Intermittent echoes visible in SSI 094129 First NBOC PLL error 094200 Switch to SSI Channel C 094500 Instruct station to idle DSP and restart to clear errors 094700 DSP reboot begins 095000 Station reports restart failed; reloading DSP software 095100 Station reports LMC software must also be reloaded 100000 DSP resumes operation (DR H9562 assigned) 100522 Begin spacecraft turn back to Earth point 100545 15 db attenuation added to Channels 1-3 100724 Telemetry ON 101000 15 dB attenuation added to Channel 4 101234 Weak carrier visible in SSI Channel C 101347 More NBOC errors 101429 Nominal AOS 101501 Receivers in lock 101600 End DSP recording 104500 Station reports LMC and DSP reconfigured 1 V rms attenuator levels reset; 15 dB extra attenuation added 105200 TLM off Begin DSP recording Acquire spectrum plot 105400 Spacecraft begins turn toward specular point 105415 LOS 105420 Station reports switch to ambient load 105700 Antennas returned to looking at sky 105800 Attenuation reduced by 15 dB 110000 Spacecraft begins tracking specular point 111000 Echo visible in SSI (Channel C; X-LCP) 111300 Switch SSI to Channel D 111500 Intermittent echoes in SSI (Channel D; S-LCP) 112100 Switch SSI to Channel A 112146 First of several NBOC errors 112301 DSP resumes recording Good echo visible in SSI (Channel A; X-RCP) 113300 Switch SSI to Channel B 113300 Good echoes on SSI (Channel B; S-RCP) 114000 Begin spacecraft turn back toward Earth point 114200 TLM ON 114710 NBOC error; DSP to idle 114917 Nominal AOS 115023 DSP resumes 115300 End DSP recording 115410 Add 15 dB attenuation (a little late!) 122639 TLM off Station reports spectrum being taken Begin DSP recording 122838 Spacecraft begins turn toward Venus 122840 LOS Station reports switch to ambient load 123100 Station reports masers now looking at sky 123200 Station reports attenuation reduced 15 dB 123340 Echo visible in SSI (Channel B; S-RCP) 123438 Spacecraft begins tracking specular point on Venus 125122 Alarm noted; DSP to idle 125323 DSP returned to run 125720 Switch SSI to Channel C 125820 DSP to idle 125930 DSP resumes 131410 Sudden, very strong echo after nothing for 10 mins (Channel C; X-LCP) 131438 Begin spacecraft turn back toward Earth point 131500 Attenuation increased 15 dB 131640 TLM ON 132100 Weak carrier visible in SSI 132355 Nominal AOS 132600 Variable carrier level in SSI 132700 End DSP recoding