POLAR PWI OPERATIONS FIFTH REVISION (7/22/97) The following operations are proposed for the entire Polar orbit, contingent upon the availability of high-rate downlinks. Until mid-October, the focus will be on the acquisition of 6-point waveform receiver data (high-rate telemetry data) for 90% of the Polar auroral zone crossings and for 100% of the plasmasphere and polar cap crossings. The remaining 10% of the auroral zone crossings will be used to acquire 3-channel interferometry data. No changes are proposed for the acquisition of low-rate telemetry data. The exceptions to this plan are the SPECIAL OPERATIONS PLAN (to be used when PSI is operating) and the VACATION MODE. NORMAL OPERATIONS:: HIGH-RATE WAVEFORM RECEIVER DATA: AURORAL ZONE CROSSINGS ((The following operations are contingent on the availability of a high- rate downlink and pre-suppose that no Science Priority Operations Topics (SPOT) intervals have been designated.)) Orbits 1,2,3,4: HFWR 6-point waveform mode: 6-channel // WFR2 on Ev and WFR3 on Ez (WBRI mode) Orbit 5: HFWR interferometry: 3-channel // WFR1 on Eu, WFR2 on Ev+, WFR3 on Ev- (WBRI mode) Orbits 6,7,8,9,10: HFWR 6-point waveform mode: 6-channel // WFR2 on Ev and WFR3 on Ez (WBRI mode) NORMAL OPERATIONS:: HIGH-RATE WAVEFORM RECEIVER DATA: SUBAURORAL, PLASMASPHERE, EQUATORIAL CROSSINGS, AND NORTHERN POLAR CAP ((The following operations are contingent on the availability of a high- rate downlink and pre-suppose that no Science Priority Operations Topics (SPOT) intervals have been designated.)) ALL ORBITS HFWR 6-point waveform mode: 6-channel // WFR2 on Ev and WFR3 on Ez (WBRI mode) NORMAL OPERATIONS:: WAVEFORM RECEIVER IN LOW-RATE TELEMETRY MODE: Orbits 1,3,6,8: WFR in 2 kHz filter mode; 6-channels; 6-point waveform Orbits 2,4,7,9: WFR in 16 kHz filter mode: 6-channels; 6-point waveform Orbit 5: WFR in 16 kHz filter mode: interferometry: WFR1 on Eu, WFR2 on Ev+ and WFR3 on Ev-; 3-channel mode Orbit 10: WFR in 16 kHz filter mode: interferometry: WFR2 on Ev+ and WFR3 on Ev-; 6-channel mode NORMAL OPERATIONS:: SWEEP FREQUENCY RECEIVERS AND MULTICHANNEL ANALYZERS: ALL ORBITS: MCA on Eu and Bu antennas (MCA default mode) SFR in log mode: Eu and L antennas (SFR default mode) SPECIAL OPERATIONS MODE:: (to be used when PSI is operating):: SPECIAL OPERATIONS:: FOR THE FIRST WEEK OF PSI OPERATIONS: ALL ORBITS: SFR in log mode: SFRA on Ez// SFRB on Loop Whenever high-rate downlinks are available, the WBR will cycle between the following operational modes: ALL ORBITS: WBR :: 90 kHz filter mode at 125 kHz conversion frequency (125-215 kHz) // 8-bit compression mode // Eu antenna (15 minutes) WBR :: 90 kHz filter mode at 250 kHz conversion frequency (250-340 kHz) // 8-bit compression mode // Eu antenna (15 minutes) SPECIAL OPERATIONS:: FOR THE SECOND WEEK OF PSI OPERATIONS: ALL ORBITS: SFR in log mode: 15-minute cycles for each antenna configuration:: SFRA on Eu // SFRB on Ez (15 minutes) SFRA on Eu // SFRB on Loop (15 minutes) SFRA on Ez // SFRB on Loop (15 minutes) Whenever high-rate downlinks are available, the WBR will cycle between the following operational modes: ALL ORBITS: WBR :: 90 kHz filter mode at 125 kHz conversion frequency (125-215 kHz) // 8-bit compression mode // Eu antenna (15 minutes) WBR :: 90 kHz filter mode at 250 kHz conversion frequency (250-340 kHz) // 8-bit compression mode // Eu antenna (15 minutes) VACATION MODE:: Low-rate telemetry configurations for HFWR, SFR and MCA will remain the same as those for NORMAL operations (see above). Whenever high-rate downlinks are available, WBR will be configured according to the following operations plan: VACATION MODE:: WIDEBAND RECEIVER DATA:: AURORAL ZONE CROSSINGS Orbit 1: WBR Filter: 90 kHz at Baseband, 8-bit compression mode Eu antenna Orbits 2,3,4,5: WBR Filter: 11 kHz at Baseband, 8-bit compression mode Eu antenna Orbit 6: WBR Filter: 90 kHz at Baseband, 8-bit compression mode Eu antenna Orbits 7,8,9,10: WBR Filter: 11 kHz at Baseband, 8-bit compression mode Eu antenna VACATION MODE:: WIDEBAND RECEIVER DATA:: SUBAURORAL, PLASMASPHERE, AND EQUATORIAL CROSSINGS Orbit 1: WBR Filter: 90 kHz at Baseband, 8-bit compression mode Loop antenna Orbits 2,3,4,5: WBR Filter: 11 kHz at Baseband, 8-bit compression mode Loop antenna Orbit 6: WBR Filter: 90 kHz at Baseband, 8-bit compression mode Loop antenna Orbits 7,8,9,10: WBR Filter: 11 kHz at Baseband, 8-bit compression mode Loop antenna VACATION MODE:: WIDEBAND RECEIVER DATA:: NORTHERN POLAR CAP ALL ORBITS WBR Filter: 90 kHz at Baseband, 8-bit compression mode Eu antenna