The first ~25% of rows in tiles-daily.csv have a null value for the PROGRAM column. In contrast specprods such as iron have no such null values.
The difference is that tiles-daily.csv is updated incrementally, while tiles-iron.csv would have been generated from scratch.
The most likely explanation is that sometime in the past desi_tsnr_afterburner had an issue with identifying the correct value for PROGRAM and left it blank. After the problem was fixed, the file was not regenerated, but instead newer tiles with valid PROGRAM were simply appended to the file.
The first ~25% of rows in
tiles-daily.csv
have a null value for the PROGRAM column. In contrast specprods such asiron
have no such null values.The difference is that
tiles-daily.csv
is updated incrementally, whiletiles-iron.csv
would have been generated from scratch.The most likely explanation is that sometime in the past
desi_tsnr_afterburner
had an issue with identifying the correct value for PROGRAM and left it blank. After the problem was fixed, the file was not regenerated, but instead newer tiles with valid PROGRAM were simply appended to the file.