Double Star PEACE Prime Parameters


Latest Version : 5.0


Information in the data files:
interval centred (click here for more information)
Status[0] Data quality as defined by CSDS

value
interpretation
0
bad data
1
use with caution
2
OK
255
fill value

Status[1] Moments Calculation Route

value
interpretation
0
data removed
1
produced from transmitted 2D velocity distribution
2
produced from transmitted 3D velocity distribution
3
produced from transmitted JPEG compressed 3D velocity distribution

Status[2] Moments Production Key

bit
value
interpretation
7
0
on two consecutive spins the sensor covers the same energy range

1
on two consecutive spins the sensor covers different energy ranges
6
0
full energy range of high energy spins transmitted

1
overlap region of high energy spins not transmitted
5
0
low energy spin
5
1
high energy spin
4
-
not used
3
0
spacecraft potential determined using PEACE onboard software

1
spacecraft potential determined on ground
2
1
ASPOC on
1
1
QM corrector used
0
0
lowest measured energy > V_SC

1
lowest measured energy < V_SC

Status[3] Supporting Information

bit
value
interpretation
7
1
caution : risk of low statistics
6
1
caution : risk of saturation
5
-
not used
4
-
not used
3
1
PEACE sensor to DPU data transfer error
2
1
no FGM data available
1
-
not used
0
-
not used


electron density in cm-3
electron GSE velocity in km/s
parallel electron temperature in MK
perpendicular electron temperature in MK
parallel electron heat flux in mu J m-2 s-1

Notes

Removal of data

Data is removed under the following conditions:
  1. during MCP tests. MCP tests are detected by checking that HAR mode is used, and that the MCP levels are varying.
  2. when the MCP level is set to zero.
  3. the first 3 spins after a PEACE instrument is switched on.


Possible INST_MODE messages

Tn>PEA>m>YYYY-MM-DDTHH:MM:SS.SSSZ>PEA_On>88m28-60m00-f-aa
Tn>PEA>m>YYYY-MM-DDTHH:MM:SS.SSSZ>PEA_Eng>MCP_Test 88h58
Tn>PEA>m>YYYY-MM-DDTHH:MM:SS.SSSZ>PEA_Eng>Grid_On
Tn>PEA>m>YYYY-MM-DDTHH:MM:SS.SSSZ>PEA_Eng>Grid_Off
Tn>PEA>m>YYYY-MM-DDTHH:MM:SS.SSSZ>PEA_Off>PEACE_science_off

where n is the spacecraft number, and m is the record number that the message first applies to.

Possible INST_SETTINGS messages

YYYY-MM-DDTHH:MM:SS.SSSZ>sunpulse rephase offset>1104

Versions

Important Note: the version number is given in the caveats. Do not use the version number of the cdf file.





Last Update: 09 Aug 2007, A.D. Lahiff