PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM DATA_SET_ID = {"CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0", "CO-V/E/J/S/SS-RPWS-2-REFDR-ALL-V1.0", "CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0", "CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0", "CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0"} PRODUCT_ID = "C28_TRIG_28" PRODUCT_VERSION_ID = "1.00" PRODUCT_TYPE = ANCILLARY INSTRUMENT_HOST_NAME = "CASSINI ORBITER" INSTRUMENT_HOST_ID = CO INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE" INSTRUMENT_ID = RPWS OBJECT = TEXT PUBLICATION_DATE = 2005-01-27 NOTE = " TRIG_28.TXT describes the RPWS instrument configuration for the High Frequency Receiver (HFR), the Medium Frequency Receiver (MFR), the Low Frequency Receiver (LFR), the Waveform Receiver (WFR), the Wideband Receiver (WBR), the Langmuir Probe (LP), the Sounder, and the onboard Dust detection algorithm when using Trigger 28." END_OBJECT = TEXT END Trigger 28 Description Sequence: C26, C27 Trigger 28 (Interplanetary Cruise with Direction-Finding & Dust & LP Sweeps) This mode is designed to provide a low bit-rate Survey with low temporal and spectral resolution for periods during cruise. No Wideband or Waveform measurements are made. The entire RPWS frequency range (1 Hz - 16 MHz) is covered. Receiver Frequency Range Sensors Time between Snapshots -------- ---------------- ------- ---------------------- LFR 1 - 25 Hz EX, BX 32 seconds MFR 25 - 12 KHz EX, BZ 32 seconds HFR 3.6 KHz - 16 MHz E 64 seconds LP N/A LP 8128 seconds The HFR is in direction-finding mode for the frequency range from 3.6 KHz to 2 MHz. Thus, measurements are made on all three monopoles EU, EV and EW. For higher frequencies only EX and EW are used. This mode is defined by: Correlations Channels Integ. Size Frequency Band Ant. Auto- Cross- per Band df Period Rep Steps kHz Start - Stop ---- ---- ----- ------ -------- -- ------ --- ----- ---- ------------ ABC 2E y y 16 y 1000 1 3.6-319 kHz H1 2E y y 1 y 160 1 18 100 325k-2.0MHz H2 2E y y 1 n 80 1 71 200 2.0M-16MHz Bands ABC require 6.40 sec to complete, H1 requires 6.07 sec, and H2 requires 6.36 sec for a total of 18.83 sec per sweep. However, to keep the bit rate down the HFR only performs one complete sweep every 64 seconds. Starting in C26, dust detection using the EZ sensor was added, and also periodic Langmuir Probe sweeps every 8128 seconds.