Search found 1464 matches

by OB.DAAC - SeanBailey
Mon Dec 11, 2023 7:57 am America/New_York
Forum: Home
Question: Python Sen3/OLCI download error
Replies: 8

Re: Python Sen3/OLCI download error

You can identify the VIIRS data sets we support in Earthdata Search by limiting your search to the 'Ocean Biology Distributed Active Archive Center' under the "Organizations" facet on the left side of the search tool. Select 'VIIRS' under the "Instruments" facet as well and you s...
by OB.DAAC - SeanBailey
Fri Dec 08, 2023 1:01 pm America/New_York
Forum: Home
Question: Observation of Symmetrical Stripes in Tropical Regions Using MODIS Aqua Satellite Data Mean
Replies: 2

Re: Observation of Symmetrical Stripes in Tropical Regions Using MODIS Aqua Satellite Data Mean

I don't want you to think your message was lost...just that it's a tricky one to evaluate. We need to better understand how you are treating the data. Can you provide a more complete dscription of your workflow? (BTW, when including code, use the code wrapper so the indentation is preserved - the bu...
by OB.DAAC - SeanBailey
Thu Dec 07, 2023 4:18 pm America/New_York
Forum: Home
Question: Python Sen3/OLCI download error
Replies: 8

Re: Python Sen3/OLCI download error

If you have a list of files, you'd want to use the --filelist option (--http-manifest is to support our data ordering system, which produces such a manifest file). That said, it seems my team was a lot faster implementing the fix than I thought would be possible. You can try your earthaccess approac...
by OB.DAAC - SeanBailey
Thu Dec 07, 2023 11:08 am America/New_York
Forum: Home
Question: Python Sen3/OLCI download error
Replies: 8

Re: Python Sen3/OLCI download error

Just a follow up... We believe we have identified the issue and indeed it is related to how earthaccess is passing credentials. The problem is how getfile accepts credentials. It will take a little while to make the appropriate changes to getfile. Until the fix is in place, you can use the earthacce...
by OB.DAAC - SeanBailey
Wed Dec 06, 2023 1:46 pm America/New_York
Forum: Home
Question: obdaac_download.py re-downloads data already existing locally without "--force"
Replies: 1

Re: obdaac_download.py re-downloads data already existing locally without "--force"

There was an issue where the last-modified header wasn't being sent, so the code could not do the comparison with the file on disk.

This has been fixed.

Thanks for alerting us to the issue,

Sean
by OB.DAAC - SeanBailey
Wed Dec 06, 2023 9:40 am America/New_York
Forum: Home
Question: Python Sen3/OLCI download error
Replies: 8

Re: Python Sen3/OLCI download error

The earthaccess code is not maintained by the OB.DAAC. It appears that there is an issue passing the EDL credentials to our getfile API. We are investigating, but may have to defer to the developers of the earthaccess code for a resolution.

Regards,
Sean
by OB.DAAC - SeanBailey
Fri Dec 01, 2023 11:29 am America/New_York
Forum: Home
Question: Adjusting L2gen gain factors for different atmospheric corrections
Replies: 1

Re: Adjusting L2gen gain factors for different atmospheric corrections

It's not a trivial undertaking... The process we currently employ is based on Franz, et al., (2007)*. In practice it requires running the l2gen code with a particular configuration that inverts the forward process of atmospheric correction. For the NIR (or SWIR) bands used in the aerosol model selec...
by OB.DAAC - SeanBailey
Thu Nov 30, 2023 2:33 pm America/New_York
Forum: Home
Question: How to download Aqua Modis data through API
Replies: 4

Re: How to download Aqua Modis data through API

Make sure the appkey was entered correctly, as well. The code will fail with the error you saw if the appkey is invalid (mistyped, or expired...We need to update the code trap this error better :shock: ).

Sean
by OB.DAAC - SeanBailey
Mon Nov 20, 2023 1:36 pm America/New_York
Forum: Home
Question: How to download Aqua Modis data through API
Replies: 4

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: Home
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...