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 = "C43_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: C29, C30, C31 Trigger 28 (Interplanetary Cruise & Dust & LP Sweeps but without Direction-Finding) 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. Starting in C29, the 3-axis direction-finding mode was removed from the HFR and instead, the sensor was changed to the dipole to increase sensitivity in an effort to detect Saturn emissions. The duty cycle of the HFR was also increased from once every 64 seconds to every 32 seconds. 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 EX, EW 32 seconds LP N/A LP 8128 seconds 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 n 1000 1 3.6-319 kHz H1 2E y y 1 n 160 1 18 100 325k-2.0MHz H2 2E y y 1 n 80 1 71 200 2.0M-16MHz Bands ABC require 3.16 sec to complete, H1 requires 3.16 sec, and H2 requires 6.00 sec for a total of 12.32 sec per sweep. However, to keep the bit rate down the HFR only performs one complete sweep every 32 seconds. Starting in C26, dust detection using the EZ sensor was added, and also periodic Langmuir Probe sweeps every 8128 seconds.