= Energy Table
== MEA2 data for 2017/01/26
We can see Energy table change on panel 2 : ht_table_id
image::documents/ETABLE/MEA2_20170126.png[width='100%']
Log file :
* link:documents/ETABLE/MEA2_20170126_LOG.txt[]
HK Commands :
* link:documents/ETABLE/MEA2_20170126_HSK_COMMAND.txt[]
== MEA2 data for 2017/01/28
=== Commands
Commands extracted from ME2 HSK data CDF L1 files, using variable *first_cmd_exe*
Next listing gives :
- record number
- time tag
- command (hexadecimal)
----
R001374 2017-01-28 12:22:52.781250 0080
R001377 2017-01-28 12:23:16.781250 0180
R001380 2017-01-28 12:23:40.781250 0380
R001383 2017-01-28 12:24:04.781250 0480
R001386 2017-01-28 12:24:28.781250 0280
----
Obviously, there are no science data before 12:30, and we can't see the energy table changes in the INFO data structure,
because there are not science data in the telemetry before 12:30.
Full listing of available commands for this date :
* link:documents/ETABLE/MEA2_20170128_HSK_COMMAND.txt[]
=== Data plot
We can see in the following plot the HSK commands 0x180, 0x380, 0x480 and 0x280, from 12:22 up to 12:24.
The science data starts at ~12:30, and we can only find Etable = #1 in the INFO data structure.
image::documents/ETABLE/MEA2_20170128.png[width='100%']
=== Source code
The following source code is used to extract Energy table from the INFO data structure :
----
////////////////////////////////////////////////////////////////////////////////
//
// INF data 8 bytes
// --------
// 4 bytes with and en# of Et-PAP : 6 bits x 5
// 1 byte sc # of Et-PAP
// 1 byte largest en# (2 * potential) used for VM cal
// 1 byte energy # of sweep stopping
// 1 byte energy table #
//
t_err Parse_INF (byte_t * data)
{
char * fname = FNAME ("Parse_INF");
t_err error = OK;
uint32_t tmp;
int e;
Message_log (1, fname, "INF : %s", Hex_dump (data, 8));
// 32 bits => 6x5 = 30 bits + 2 bits unused (LSB)
tmp = get_uint32 (data) >> 2;
for (e = 0; e < 5; e++) {
INF.energy_band [4-e] = tmp & 0x3F;
tmp >>= 6;
}
Message_log (1, fname, "Energy bands = [%d, %d, %d, %d, %d]",
INF.energy_band [0],
INF.energy_band [1],
INF.energy_band [2],
INF.energy_band [3],
INF.energy_band [4]);
INF.sector_num = data [4];
INF.energy_pot = data [5];
INF.energy_stop = data [6];
INF.energy_table = data [7];
Message_log (1, fname, "Energy Table = %d VM pot = %d Sweep Stop = %d PAP Sector = %d",
INF.energy_table,
INF.energy_pot,
INF.energy_stop,
INF.sector_num);
EXIT: return error;
}
----
The following line are extracted from the log file.
They show the energy table information for the first 3 INFO data structure available :
----
TIME (HDR) : 2017-01-28T12:30:40.396484352
HDR : M2 GF8
Energy bands = [0, 9, 15, 21, 27]
Energy Table = 1 VM pot = 32 Sweep Stop = 32 PAP Sector = 0
TIME (HDR) : 2017-01-28T12:30:56.949218752
HDR : M2 GF8
Energy bands = [0, 9, 15, 21, 27]
Energy Table = 1 VM pot = 32 Sweep Stop = 32 PAP Sector = 0
TIME (HDR) : 2017-01-28T12:31:09.363281280
HDR : M2 GF8
Packet Number : 1 Mode_64 = 0
INF : 00 93 D5 6C 00 20 20 01
Energy bands = [0, 9, 15, 21, 27]
Energy Table = 1 VM pot = 32 Sweep Stop = 32 PAP Sector = 0
----
