LAXPC Data Reduction Guideline for the POC

Processing of Level1 to Level2 is done at the Payload Operations Centers (POCs) with lxplevel2datapipeline

The level2 data structure

Suggested file management:

/data/in/level1/*level1*.tar

/data/out/level2/

Create separate directories for conversion of level1 data to level2 data.

/data/processing/level1

/data/processing/level2

Untar the level1 tar file that you wish to process

Move the extracted Level1 directory to

/data/processing/level1

In some cases, data frames in level1 may not be ordered by the Frame Sequence Number. Need to order the frames using fview before the data processing pipeline is run. Alternately you can use this. This programme also checks if there are datadrops, for example, due to telemetry.

lxplevel2datapipeline infile=/data/processing/level1/ outfile=data/processing/level2/

It produces Level2 data files for each data directory inside /data/processing/level1

Delete everything in /data/processing/level1/

Move everything from /data/processing/level2/ to /data/out/level2/

The successive events in the event mode data should have time in ascending order. You can verify the same.

If everything is fine, upload level2 data to ISSDC. Otherwise, report to ISSDC.