Based on IRGA75-A but with a different gain on CO2_CONC.
## Variables
- DATA_SIZE ... Data size of current data block, number of bytes in Licor 7500 record
(2 = missing, 16 = available)
- STATUS_CODE ... Status of IRGA data aquisition, see Table 7 in WE's sonicread.pdf
- octal value converted to integer yields:
- 0 .. Status OK, no problems (octal 0000)
- 20 .. IRGA did not respond (0020)
- 40 .. Status OK, old data used (0040)
- 200 .. not OK, IRGA data are missing (0200)
- GA_DIAG_CODE ... IRGA diagnostic value
- The cell diagnostic value is a 1 byte unsigned integer (value between 0 and 255) with the following bit map (in order of how the code reads it, orig bit position in brackets):
- (7) CHOPPER: 1 = OK
- (6) DETECTOR: 1 = OK
- (5) PLL: 1 = OK
- (4) SYNC: 1 = OK
- (3,2,1,0) AGC: 100% = bad (generally true, but check data files for exceptions), automatic gain control, window dirtiness, signal strength
- 'output': 1 means that the var is written to the output stream of this data block, i.e. included in the
output file.
- H2O_CONC ... H2O concentration density, molar density
- CO2_CONC ... CO2 concentration density, molar density
**A GAIN of 0.974 is applied to this signal to correct for the usage of a wrong calibration gas.
For more info, see here: https://www.swissfluxnet.ethz.ch/index.php/knowledge-base/wrong-calibration-gas-2017/**
- T_BOX ... Ambient temperature measured in the control box
- P_BOX ... Atmospheric pressure measured in the control box
- COOLER_V ... Cooler voltage
## BICO Settings
- 'order' ... Order in the data block variable sequence
- 'bytes' ... Number of bytes in the binary data
- 'format' ... Format to convert from binary to integers, floats, etc.
- 'gain_on_signal' ... Gain that was applied to the raw data signal, to get to units *divide* by this gain
- 'offset_on_signal' ... Offset that was added to the raw data signal, to get to units *subtract* this offset
- 'apply_gain' ... Gain that is applied during conversion, e.g. to convert to different units if needed
- 'add_offset' ... Offset that is added during conversion, e.g. to convert to different units if needed
- 'units' ... Units
- 'datablock' ... Data block ID
*Before BICO, the binary conversion was done in FCT FluxCalcTool:*
- Old ID in FCT: li-7500_co2_gain0974
- Old data block in FCT: data_block_irga_li7500_co2_gain0974
