Re: NWC 'Cloud Types' on EUMETCast


Ernst Lobsiger
 

Graham and Manu,

these are the numbers of HVS-2 OLCI ERR files on 2 error free tc receivers:

2022            Sentinel-3A        Sentinel-3B
May 19            14                       17
May 20            13                       16
May 21            10                       18

It seems that Sentinel-3B has more files than expected. Looking at May 21 with 18 files shows:

-rw-r--r-- 1 root root 730224640 May 21 04:10 S3B_OL_1_ERR____20220521T010844_20220521T015309_20220521T034336_2665_066_131______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 752793600 May 21 05:54 S3B_OL_1_ERR____20220521T024942_20220521T033408_20220521T053050_2666_066_132______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 732190720 May 21 07:35 S3B_OL_1_ERR____20220521T043041_20220521T051507_20220521T071247_2666_066_133______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 723302400 May 21 09:13 S3B_OL_1_ERR____20220521T061140_20220521T065606_20220521T084758_2666_066_134______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 724756480 May 21 10:48 S3B_OL_1_ERR____20220521T075239_20220521T083705_20220521T102101_2666_066_135______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 728811520 May 21 12:41 S3B_OL_1_ERR____20220521T093338_20220521T101804_20220521T120904_2666_066_136______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 728023040 May 21 14:25 S3B_OL_1_ERR____20220521T111437_20220521T115902_20220521T135854_2665_066_137______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 726958080 May 21 15:53 S3B_OL_1_ERR____20220521T125536_20220521T134001_20220521T152341_2665_066_138______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 743127040 May 21 17:37 S3B_OL_1_ERR____20220521T143635_20220521T152100_20220521T170823_2665_066_139______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 736358400 May 21 19:19 S3B_OL_1_ERR____20220521T161734_20220521T170159_20220521T185234_2665_066_140______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 602214400 May 21 21:02 S3B_OL_1_ERR____20220521T175833_20220521T183431_20220521T203720_2158_066_141______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root  30914560 May 21 21:20 S3B_OL_1_ERR____20220521T183431_20220521T183631_20220521T211611_0120_066_141______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 105297920 May 21 20:45 S3B_OL_1_ERR____20220521T183631_20220521T184258_20220521T203733_0387_066_141______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 728832000 May 21 22:42 S3B_OL_1_ERR____20220521T193932_20220521T202357_20220521T221200_2665_066_142______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 735918080 May 22 00:22 S3B_OL_1_ERR____20220521T212031_20220521T220456_20220521T235111_2665_066_143______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 521789440 May 22 02:10 S3B_OL_1_ERR____20220521T230130_20220521T233328_20220522T014104_1917_066_144______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root  30330880 May 22 02:22 S3B_OL_1_ERR____20220521T233328_20220521T233528_20220522T021908_0120_066_144______MAR_O_NR_002.SEN3.tar
-rw-r--r-- 1 root root 172339200 May 22 01:53 S3B_OL_1_ERR____20220521T233528_20220521T234555_20220522T014115_0627_066_144______MAR_O_NR_002.SEN3.tar

Apparently there are some ERR files far smaller than the expected 45 minutes (see also file sizes). My system sorts files into a YYYY/MM/DD structures according to start of segment. A full 45 minutes file starting 2022 May 1st 23:59 UTC will still be in directory 2022/05/01. My satpy script assumes 45 minute passes/segments only. I have to think and we'll see whether there could be a problem with these snipplets from Sentinel-3B.

Best Regards,
Ernst

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