PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2012-12-18 NOTE = " TRIG_A0.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 Langmiur Probe (LP), the Sounder, and the Dust detector algorithm when using Trigger A0." END_OBJECT = TEXT END Trigger A0 Description Sequence: C37, ... Trigger A0 ( SEDDF Mode ) This mode is designed to provide a Survey mode capable of detecting SED's and doing 2-antenna direction-finding on them, with standard temporal resolution and spectral resolution.Both low-frequency and high-frequency WFR measurements are made, using "toggle" mode. Dust detection is included. Langmuir Probe sweeps are performed every 640 seconds. A Sounder measurement is scheduled every 10 minutes. MFDR measurements are made every 32 seconds, which provides MFR2 replacement data, while the LFR measurements are also made every 32 seconds, providing the 25-Hz LFR data. The HFR uses shorter integration constants for H1 and H2, with the goal to detect SED's, and it is run twice as fast as the other survey modes. Receiver Frequency Range Sensors Snapshot Spacing -------- ---------------- -------------- ---------------- LFR 1 - 25 Hz EX, BX 32 seconds MFDR 70 - 1700 Hz EX, BX 32 seconds MFR 25 - 12 KHz EX, BZ 32 seconds WFR 1 - 25 Hz EX,EW,BX,BY,BZ 320 seconds WFR .1 - 2.5 KHz EX,EW,BX,BY,BZ 320 seconds HFR 3.6 KHz - 16 MHz EX, EW 8 seconds LP N/A Langmuir Probe 640 seconds Sounder 3.6 - 115 KHz EX, EW 600 seconds The HFR is in a modified "Composite Survey" mode, which includes both auto- and cross-correlations for H1, and differs from standard Survey mode in that its integration constants for H1 and H2 are shorter. 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 32 n 500 1 3.6-319KHz HF1 2E y y 2 n 40 1 60 25 0.325-1.825MHz HF2 1E n n 1 n 40 1 72 200 1.825-16.225MHz Bands ABC require 1.580 sec to complete, H1 requires 2.852 sec, and H2 requires 2.534 sec for a total of 6.966 sec per sweep. The hfr cycle time is 8.000 seconds. Every 600 seconds the HFR normal analyses are interrupted by a Sounder analysis. The Sounder operation has a duration of approximately 40 seconds. This Sounder analysis is defined by: sounder mode: Ex AAA 1st sounder freq: 0 last sounder freq: 89 T1 delay: 5 msec T2 delay: 5 msec T3 delay: 15 msec passive spectra: 2 active spectra: 2 # of cycles: 1 sounder output A: 3 autos sounder output B: 3 AGCs