Search found 297 matches

by LAADS_UserServices_M
Tue Jul 23, 2024 6:15 am America/New_York
Forum: Home
Question: The convention of the sensor azimuth and the solar azimuth variable provided in the MYD06 data product
Replies: 1

Re: The convention of the sensor azimuth and the solar azimuth variable provided in the MYD06 data product

The solar azimuth angle is the compass direction from which the sunlight is coming at a particular location and time. The sensor azimuth angle is the direction from which the satellite sensor is viewing the target point on the Earth’s surface. The angle 0 degree represents north, 90 degree represent...
by LAADS_UserServices_M
Mon Jul 22, 2024 10:00 am America/New_York
Forum: Home
Question: Open Source VIIRS processing Software?
Replies: 2

Re: Open Source VIIRS processing Software?

No, there is no open source release of the software used to created VIIRS level 2 data. However, in some case users can request for the software following steps and instruction provided at:
https://modaps.modaps.eosdis.nasa.gov/services/pge/
by LAADS_UserServices_M
Thu Jul 11, 2024 2:00 pm America/New_York
Forum: Home
Question: query new files in directory
Replies: 8

Re: query new files in directory

@captlen, you need to create a separate post for your question because your question is related to a different archive center.
by LAADS_UserServices_M
Thu Jul 11, 2024 6:54 am America/New_York
Forum: Home
Question: MOD06_L2 data ranges and missing data
Replies: 8

Re: MOD06_L2 data ranges and missing data

We cannot provide assistance with gdal. However, you can see the complete file specification of the product which gives a complete description of the Cloud (06_L2) HDF product file, including all the Scientific Data Sets and their local attributes at: https://atmosphere-imager.gsfc.nasa.gov/products...
by LAADS_UserServices_M
Wed Jul 10, 2024 6:49 am America/New_York
Forum: Home
Question: Issue with Time Range Selection in Data Retrieval
Replies: 1

Re: Issue with Time Range Selection in Data Retrieval

Sorry for a delay in response. Yes, we were having an issue with file selection due to a bug in the code. The issue have since been resolved. Please, let us know if you still see the issue.
by LAADS_UserServices_M
Wed Jul 10, 2024 6:42 am America/New_York
Forum: Home
Question: MOD06_L2 data ranges and missing data
Replies: 8

Re: MOD06_L2 data ranges and missing data

Here is the description for the 3-dimension “Retrieval_Failure_Metric” in a MOD06_L2 granule: short Retrieval_Failure_Metric(Cell_Along_Swath_1km=2030, Cell_Across_Swath_1km=1354, RFM_nband=3); :long_name = "Retrievals and other information for points that failed to retrieve via standard soluti...
by LAADS_UserServices_M
Mon Jul 08, 2024 2:06 pm America/New_York
Forum: Home
Question: v002 delays and incomplete updates VJ113A1 VNP13A1
Replies: 2

Re: v002 delays and incomplete updates VJ113A1 VNP13A1

We checked and for the VNP13A1 and VJ113A1 for June 17, 2024 the tiles you asked about are all available. Full suite of products were generated on July 3, 2024. The VI (VNP13A1/VJ113A1) is a 16-day product, so the outputs are not created until 16-days (give or take a little) from the start time of t...
by LAADS_UserServices_M
Mon Jul 08, 2024 12:56 pm America/New_York
Forum: Home
Question: MOD06_L2 data ranges and missing data
Replies: 8

Re: MOD06_L2 data ranges and missing data

Our product SME investigated MOD06_L2 data and found how to distinguish Cloud_Optical_Thickness (COT) between no data case and failed retrieval. For example, for 2.1 micron (band 7), the valid range for scaled Cloud_Optical_Thickness (1354, 2030) is [0,150]. The valid range for scaled Retrieval_Fail...
by LAADS_UserServices_M
Fri Jul 05, 2024 1:05 pm America/New_York
Forum: Home
Question: download VJ2 products
Replies: 1

Re: download VJ2 products

Dear Marco Laiolo: The Near Real Time (NRT) products (e.g., VJ202MOD_NRT and VJ203MOD_NRT) and standard products (e.g., VJ202MOD and VJ203MOD) are archived and distributed from different servers. All NRT products are available from https://nrt3.modaps.eosdis.nasa.gov/ (main) or https://nrt4.modaps.e...
by LAADS_UserServices_M
Fri Jul 05, 2024 8:32 am America/New_York
Forum: Home
Question: MOD06_L2 data ranges and missing data
Replies: 8

Re: MOD06_L2 data ranges and missing data

Yes, the scale and the add_offset are fixed for each Scientific Data Set (SDS). The following conversion equation should be used to convert stored integers back to useful floating point values: float_value = scale_factor * (integer_value – add_offset) Information about missing data is provided in th...