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CALIPSO data lost over South America

Posted: Sun Jun 01, 2025 11:50 am America/New_York
by boxinyu
Hi,
I’m using the product CAL_LID_L3_Tropospheric_APro_AllSky-Standard-V4-20_V4-20, and I noticed that since September 2016, data over South America appears as missing (−9999).

Does anyone know why this happens? Is it a known issue with CALIPSO?

Thanks!

Re: CALIPSO data lost over South America

Posted: Mon Jun 02, 2025 12:52 pm America/New_York
by ASDC - cheyenne.e.land
Hello @boxinyu,

The value -9999 indicates a fill value which is quite common in data processing and analysis. Fill values represent invalid or missing data which is critical in order to avoid errors in calculations.


Thanks,
ASDC