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wsular / INL-scalar-transport

Source code for dataloggers at Idaho National Labs scalar transport research project
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Alignment of high-frequency data #17

Open patricktokeeffe opened 3 years ago

patricktokeeffe commented 3 years ago

The high-frequency instruments all have different inherent delays which must be accounted when aligning time-series data for flux computations.

Sensor Delay (ms) Ref
CSAT3 (level B1) 2 scans = 0.2 sec (using command 98 & group trigger ✓) CR1000X.Std.05.00 CRBasic Help &
CSAT3B User Manual rev 3/18
CSAT3B (all others) 1 scan = 0.1 sec (using mode 0 ✓) CSAT3B User Manual rev 3/18
LI-7500 (levels B3 & D4) fixed 186ms + user-configured delay (unknown*)
recommended delay step is 17 to yield total delay of 297ms		 LI-7500 User Manual Rev 4 (2004)
LI-7500A/RS (all others) fixed 130ms + user-configured delay (unknown**)
recommended delay step is 25 to yield total delay of 297ms		 LI-7500A/RS User Manual rev Oct 13, 2021

*need to verify, might be set to 17 already from prior use **need to verify, not sure if these were ever changed

patricktokeeffe commented 2 years ago

@zmgao did you update SDM delay steps for any of the LI-7500A/RS? I only had time to connect to the D2 IRGA last week and I recall seeing user-defined delay was still 0