Search found 1446 matches

by OB.DAAC - SeanBailey
Thu Oct 05, 2023 2:09 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS AC processing using MBAC approach
Replies: 4

Re: SeaDAS AC processing using MBAC approach

The earliest implementation of MBAC in l2gen go back to 2016, however, MBAC has not been implemented as a default approach for any sensor to date. However, it will be used for the OCI instrument on the soon-to-be-launched PACE mission. You can try it out with aer_opt=-18, but it is not supported by ...
by OB.DAAC - SeanBailey
Mon Oct 02, 2023 11:50 am America/New_York
Forum: Questions/Comments
Question: Wrong SeaWiFS PAR on MLAC swath borders
Replies: 2

Re: Wrong SeaWiFS PAR on MLAC swath borders

Julian, Thanks for alerting us to the issue. Adding HISATZEN is a good stop-gap measure for the MLAC data, however it will exclude more than is necessary. Once we have identified the cause for the erroneous data in the SeaWiFS MLAC PAR output (it appears to only affect SeaWiFS MLAC), we determine ho...
by OB.DAAC - SeanBailey
Thu Sep 21, 2023 7:31 am America/New_York
Forum: Questions/Comments
Question: When the SeaDAS could process the image bands of VIIRS?
Replies: 5

Re: When the SeaDAS could process the image bands of VIIRS?

The VIIRS I-bands are not supported in l2gen, nor are there any plans to do so.

Sean
by OB.DAAC - SeanBailey
Fri Sep 01, 2023 2:56 pm America/New_York
Forum: Questions/Comments
Question: Problems to untar file with MODIS PAR L3 images
Replies: 7

Re: Problems to untar file with MODIS PAR L3 images

The --http_manifest option takes the manifest URL as input, e.g.: ❯ obdaac_download --http_manifest=https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/http_manifest.txt\?h\=ocdist305\&p\=/data1/e030e02b2cfc4c60 -v Retrieving https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/http_manifest.txt?h=ocdist...
by OB.DAAC - SeanBailey
Thu Aug 31, 2023 4:54 pm America/New_York
Forum: Questions/Comments
Question: L3b_DAY_CYAN data
Replies: 8

Re: L3b_DAY_CYAN data

The URL in the post you found was moved with the reorganized website. It now lives here:https://oceancolor.gsfc.nasa.gov/resources/docs/format/l3bins/ The sample code on that page will show you how to get the geolocation for a given bin, however, it doesn't show how to retrieve the geophysical value...
by OB.DAAC - SeanBailey
Fri Aug 25, 2023 12:43 pm America/New_York
Forum: Questions/Comments
Question: Batch processing in Seadas
Replies: 9

Re: Batch processing in Seadas

Just a comment on l3mapgen - while it has a set of default projections it supports, it also accepts user defined projections...if it's available in Proj, it's (very likely) available in l3mapgen

Regards,
Sean
by OB.DAAC - SeanBailey
Thu Aug 17, 2023 8:45 am America/New_York
Forum: Questions/Comments
Question: distance to coast dataset
Replies: 1

Re: distance to coast dataset

Peter,

The page didn't move far: https://oceancolor.gsfc.nasa.gov/resources/docs/distfromcoast/
It was never really easy to find, but I agree it is now less so. We'll see what we can do to bubble it up a bit.

Sean
by OB.DAAC - SeanBailey
Sat Aug 05, 2023 2:16 pm America/New_York
Forum: Questions/Comments
Question: How to calculate csol_z?
Replies: 5

Re: How to calculate csol_z?

The l2gen scan line attributes variable csolz is not the same as the l1rec->csol_z variable. The former is the solar zenith angle for the center of the scan line, the later (required by the algorithm) is the cosine of the solar zenith angle at each pixel. It is not a product that l2gen can output, a...
by OB.DAAC - SeanBailey
Thu Jul 27, 2023 5:01 pm America/New_York
Forum: Questions/Comments
Question: modis_L1B stopped outputting HKM and QKM files
Replies: 2

Re: modis_L1B stopped outputting HKM and QKM files

0700 UTC for the Chesapeake Bay is at night....so the granule doesn't have valid reflective solar band data and the HKM and QKM files (which only have reflective solar bands) are not output.

Sean
by OB.DAAC - SeanBailey
Sun Jul 23, 2023 9:57 pm America/New_York
Forum: Questions/Comments
Question: Kd490 data VIIRS vs MODIS
Replies: 7

Re: Kd490 data VIIRS vs MODIS

Tom,
I used the tools we make available with the SeaDAS package to generate those images of the L3 mapped Kd490 data, specifically the l3mapgen program.
Regards,
Sean