IHR

binary record ""

size: 396

Instrument Header Record of the Science Data Packet

field name

definition

identifier

binary uint16	size: 2
GOME identifier and transfer frame counter (fixed value: 3584)

seq_ctrl

binary uint16	size: 2
Packet sequence control (subtract 49152 to get sequence number)

length

binary uint16	size: 2
Packet length (always equal to 7993 even if GOME is forced to truncate the packets)

pixel_time

binary uint32	size: 4
GOME pixel time

subset_counter

binary uint16	size: 2
Subset Counter (0, 1, 2, or 3)

cmd_echo

binary array[6]

size: 12

Command echo (6 words; words 5-6 are time ICU)

binary uint16 size: 2

instr_status

binary uint32

size: 4

Instrument status (bit 0: Operating mode {0=normal, 1=patch/dump}; bit 1: Checksum status (only if bit 0 is set) {0=failed, 1=checksum is correct}; bit 2: Last DEU command {0=not valid, 1=valid}; bit 3-4: Last S,U - DDHU protocol message {00=SU OFF or comm error, 01=BEL (out of range), 10=3 x NACK received, 11=ACK (command OK)}; bit 5: Aux data external stimulus {0=disabled, 1=enabled}; bit 6: FPA latch-up protection {0=OFF, 1=ON}; bit 7: RTM latch-up protection {0=OFF, 1=ON}; bit 8: LED's driver 1 {0=OFF, 1=ON}; bit 9:LED's driver 2 {0=OFF, 1=ON}; bit 10: Calibration Unit {0=OFF, 1=ON}; bit 11: Scan Mirror heater level 1 {0=OFF, 1=ON}; bit 12: Scan Mirror heater level 2 {0=OFF, 1=ON}; bit 13: ADC calibration {0=OFF, 1=ON}; bit 14-15: cover status {00=intermediate position, 01=open, 10=closed, 11=error}; bit 16-17: cooler 1 status {00=OFF, 01=ON 75deg, 10=ON 253K, 11=ON 235K}; bit 18-19: cooler 2 status {00=OFF, 01=ON 75deg, 10=ON 253K, 11=ON 235K}; bit 20-21: cooler 3 status {00=OFF, 01=ON 75deg, 10=ON 253K, 11=ON 235K}; bit 22-23: cooler 4 status {00=OFF, 01=ON 75deg, 10=ON 253K, 11=ON 235K}; bit 24: FPA temperature 2 channel 1 {0=disable, 1=enable}; bit 25: FPA temperature 2 channel 1 {0=disable, 1=enable}; bit 26: FPA temperature 2 channel 2 {0=disable, 1=enable}; bit 27: FPA temperature 2 channel 2 {0=disable, 1=enable}; bit 28: FPA temperature 2 channel 3 {0=disable, 1=enable}; bit 29: FPA temperature 2 channel 3 {0=disable, 1=enable}; bit 30: temperature 2 channel 4 {0=disable, 1=enable}; bit 31: temperature 2 channel 4 {0=disable, 1=enable})

integr_status

binary uint16

size: 2

Integration status (bit 0-3: Co-adding division {bit 0: factor 2 for FPA 4, bit 1: factor 4 for FPA 3, bit 2: factor 2 for FPA 3, bit 3: factor 2 for FPA 2}; bit 4-5 Band 1a status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel}; bit 6-7 Band 1b status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel}; bit 8-9 Band 2a status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel}; bit 10-11 Band 2b status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel}; bit 12-13 Band 3 status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel}; bit 14-15 Band 4 status {00=IT not completed in this ground pixel, 01=IT aborted in this ground pixel, 10=IT forced to 93.75ms in this ground pixel, 11=nominal IT completed in this ground pixel})

max_pixel_1a

binary uint16	size: 2
Max pixel of band 1a (N2)

max_pixel_2a

binary uint16	size: 2
Max pixel of band 2a (N1)

time_int_1a

binary uint16	size: 2
Integration time of band 1a

time_int_1b

binary uint16	size: 2
Integration time of band 1b

time_int_2a

binary uint16	size: 2
Integration time of band 2a

time_int_2b

binary uint16	size: 2
Integration time of band 2b

time_int_3

binary uint16	size: 2
Integration time of band 3

time_int_4

binary uint16	size: 2
Integration time of band 4

peltier_output

binary array[4]

size: 8

Last peltier output data (channels 1-4)

binary uint16 size: 2

pol_scan_unit

binary array[16]

size: 128

Polarisation and scan unit data

binary record size: 8

id field name definition

0 polarisation

binary array[3] size: 6

Polarisation for detector 1-3 (near UV, visible, near red). If the POL-IMOT averaging bit of the scan mirror mode field is set, this data is the average of 16 samples of the relevant signal sampled 16 times equally spaced during the 93.75ms period

binary uint16 size: 2

1 scan_mirror_pos

binary uint16 size: 2

Scan mirror position (bit 15: On/Off mode {0=OFF, 1=ON}; bit 14: Frame Valid Reset {0=not Reset, 1=Reset}; bit 13: POL-IMOT averaging {0=OFF, 1=ON}; bit 12: Dump X-band {0=no Dump, 1=Dump}; bit 11: Dump S-band {0=no Dump, 1=Dump})

fpa_temp

binary array[4, 4, 2]

size: 64

FPA temperature (4 data sets x 4 channels x 2 temperatures)

binary uint16 size: 2

charge_amp_temp

binary array[4]

size: 8

Charge amplifier temperature (channels 1-4)

binary uint16 size: 2

pol_unit_temp

binary uint16	size: 2
Polarisation unit temperature

aux_ext

binary uint16	size: 2
Auxiliary external (only valid if the aux data external stimulus bit of the instrument status field is set)

scan_mirror_temp

binary uint16	size: 2
Scan mirror temperature

scan_motor_temp

binary uint16	size: 2
Scan motor temperature

scan_unit_elec_temp

binary uint16	size: 2
Scan unit electronics temperature

cal_unit_lamp_temp

binary uint16	size: 2
Calibration unit lamp temperature

cal_unit_dc_temp

binary uint16	size: 2
Calibration unit DC/DC temperature

sun_diff_temp

binary uint16	size: 2
Sun diffuser temperature

ddhu_analog_chain_temp

binary array[4]

size: 8

DDHU channel 1-4 analog chain temperature

binary uint16 size: 2

ddhu_dc_conv_temp

binary uint16	size: 2
DDHU DC/DC converter temperature

ddhu_plt_temp

binary uint16	size: 2
DDHU PLT board temperature

ddhu_prl_temp

binary uint16	size: 2
DDHU PRL board temperature

cool_rad_temp

binary uint16	size: 2
Cooler radiator temperature

opt_bench

binary uint16	size: 2
Optical bench under CU

opt_bench_center

binary uint16	size: 2
Center of optical bench

opt_bench_z

binary uint16	size: 2
+Z side of optical bench

opt_bench_x

binary uint16	size: 2
-X side of optical bench

opt_bench_y

binary uint16	size: 2
-Y side of optical bench

prism_temp

binary uint16	size: 2
Pre-disperser prism temperature

cal_lamp_v

binary uint16	size: 2
Calibration lamp voltage

cal_lamp_i

binary uint16	size: 2
Calibration lamp current

sample_data

binary record

size: 40

FPA sample data

field name

definition

chan_1_pix_256

binary uint16	size: 2
Channel 1 pixel #256

chan_1_pix_384

binary uint16	size: 2
Channel 1 pixel #384

chan_1_pix_511

binary uint16	size: 2
Channel 1 pixel #511

chan_1_pix_512

binary uint16	size: 2
Channel 1 pixel #512

chan_1_pix_750

binary uint16	size: 2
Channel 1 pixel #750

chan_1_pix_950

binary uint16	size: 2
Channel 1 pixel #950

chan_2_pix_185

binary uint16	size: 2
Channel 2 pixel #185

chan_2_pix_250

binary uint16	size: 2
Channel 2 pixel #250

chan_2_pix_350

binary uint16	size: 2
Channel 2 pixel #350

chan_2_pix_450

binary uint16	size: 2
Channel 2 pixel #450

chan_2_pix_608

binary uint16	size: 2
Channel 2 pixel #608

chan_2_pix_1023

binary uint16	size: 2
Channel 2 pixel #1023

chan_3_pix_0

binary uint16	size: 2
Channel 3 pixel #0

chan_3_pix_512

binary uint16	size: 2
Channel 3 pixel #512

chan_3_pix_1023

binary uint16	size: 2
Channel 3 pixel #1023

chan_4_pix_0

binary uint16	size: 2
Channel 4 pixel #0

chan_4_pix_512

binary uint16	size: 2
Channel 4 pixel #512

chan_4_pix_1023

binary uint16	size: 2
Channel 4 pixel #1023

chan_1_bldpix_1

binary uint16	size: 2
Channel 1 blind area pixel #1

chan_1_bldpix_156

binary uint16	size: 2
Channel 1 blind area pixel #156

offset_i

binary uint16	size: 2
Acquisition chain current offset value

offset_v

binary uint16	size: 2
Acquisition chain voltage offset value

scan_mirror_bias

binary uint16	size: 2
Scan mirror bias

scan_mirror_mode

binary uint16	size: 2
Scan mirror mode

apm_lu_count

binary uint16	size: 2
APM latch-up counter

rtm_lu_count

binary uint16	size: 2
RTM latch-up counter

motor_i

binary array[16]

size: 32

Motor current (set 1-16)

binary uint16 size: 2

spare

binary bytes	size: 10
Spare (with fixed value 'BB' Hex)

hidden: true