Search found 1420 matches

by OB.DAAC - SeanBailey
Mon Nov 20, 2023 1:36 pm America/New_York
Forum: Questions/Comments
Question: How to download Aqua Modis data through API
Replies: 3

Re: How to download Aqua Modis data through API

First, I'll make the assumption that you replaced {{APP_KEY}} with your app key value :D

Since you had --verbose set, what (if any) errors did it output?

Sean
by OB.DAAC - SeanBailey
Fri Nov 10, 2023 1:16 pm America/New_York
Forum: Questions/Comments
Question: Band maths before L2gen
Replies: 2

Re: Band maths before L2gen

If you are looking to change the reflectance for the SWIR bands (or any band for that matter) for processing with l2gen, there is no need to modify the input L1B file. The way to do this with l2gen is to modify the gain parameter. The SWIR gains for MODIS are set to unity as the signal to noise is t...
by OB.DAAC - SeanBailey
Mon Nov 06, 2023 2:08 pm America/New_York
Forum: Questions/Comments
Question: SeaDAS AC processing using MBAC approach
Replies: 4

Re: SeaDAS AC processing using MBAC approach

Note, I did say "it is not supported by all sensors". The MBAC algorithm uses an uncertainty input file to weight the bands used in the fit. Not all sensors have had this file generated, in fact, for most one does not exist. As we implement MBAC for sensor for which it makes sense, we will...
by OB.DAAC - SeanBailey
Fri Oct 06, 2023 3:15 pm America/New_York
Forum: Questions/Comments
Question: PIC-Kd490 correlation
Replies: 2

Re: PIC-Kd490 correlation

There may be several reasons for a lack of correlation. The empirical algorithm for Kd490 was not developed with data that includes high concentrations of PIC (i.e. coccolithophore blooms). The conditions present during an intense coccolithophore bloom likely violate the assumptions used in the deve...
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