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.