PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-06-15                                           
  NOTE                 = "                                                    
      C42_TRIG_80.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 80."        
END_OBJECT           = TEXT                                                   
END                                                                           
                                                                              
                                                                              
Trigger 80 Description                                                        
                                                                              
Sequence: C40, ...                                                            
                                                                              
Trigger 80 ( Direction-Finding Survey )                                       
                                                                              
This mode is designed to provide a direction-finding survey mode, 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. The      
Sounder is disabled.  WFR measurements are made every 32 seconds, which       
provides both LFR and MFR2 replacement data via ground processing of the WFR  
data. However, the snapshot length is set to 512 samples in order to avoid    
interference from the HFR, which is in direction-finding mode                 
                                                                              
Receiver  Frequency Range   Sensors         Time between Snapshots            
--------  ----------------  --------------  ----------------------            
MFR       25 - 12 KHz       EX, BZ          32 seconds                        
WFR       1 - 25 Hz         EX,EW,BX,BY,BZ  64 seconds                        
WFR       .1 - 2.5 KHz      EX,EW,BX,BY,BZ  64 seconds                        
HFR       3.6 KHz - 16 MHz  EX, EW          16 seconds                        
LP        N/A               Langmuir Probe  640 seconds                       
                                                                              
The HFR is in direction-finding mode for its entire frequency                 
range from 3.6 KHz to 16 MHz. Thus, measurements are made on all three        
monopoles EU, EV and EW.                                                      
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      8     y  250    1              3.6-319 kHz          
H1   2E   y        y      1     y  80     1   76    50   325k-4.1MHz          
H2   2E   y        y      1     y  80     1   61    200  4.0M-16MHz           
                                                                              
Bands ABC require 1.69 sec to complete, H1 requires 13.06 sec, and H2         
requires 10.50 sec for a total of 25.25 sec per sweep. However, to allow time 
for WFR and MFR snapshots to occur without interference, one complete sweep   
is done every 32 seconds. To avoid the interference from the DF mode, the MFR 
uses the EW antenna.