Data key "NASA solar direct normal irradiance.csv"

In the data set "NASA solar direct normal irradiance.csv" there is a column "_ID". What does this ID refer to?  Is it a lat/lon or date? Where is this information available?

http://en.openei.org/datasets/dataset/6132d781-730a-4e13-b89d-b78f3575d40a/resource/b59704fd-1ef3-4687-a46d-19a39a3b0962/download/ltinasalowres.csv

Thank you.

Submitted by Jtindell on 9 February, 2017 - 09:19

4 answers

Points: 0

Thank you for your response. Jtindell on 15 February, 2017 - 13:38

Points: 0

After asking around, I learned that this is a derivative dataset, and it was mislabeled as DNI data, but is actually LTR data. I've renamed http://en.openei.org/datasets/dataset/nasa-sse-global-monthly-average-solar-dni-data to http://en.openei.org/datasets/dataset/nasa-sse-global-monthly-average-solar-ltr-data and corrected the description. As for the _ID column, these are grid cell ids; the mapping to lat/lon should be in the accompanying shapefile. Jayhuggins on 13 February, 2017 - 09:57

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Thank you for responding so quickly. I am from user services at support-asdc@earthdata.nasa.gov. One of OpenEI's users tried to use the data mentioned previously. They contacted us to decipher their download. I am trying to help them. Unfortunately, the OpenEI data is not a straight pull from the SSE site and I cannot find methodology for the process used to create the aforementioned data set. Can you please provide more information? The data from the following 3 sites appears to be pulled into the OpenEI data set "NASA solar direct normal irradiance.csv". Direct Normal Radiation (kWh/m^2/day) https://eosweb.larc.nasa.gov/sse/global/text/direct_radiation Minimum Direct Radiation (kWh/m^2/day) https://eosweb.larc.nasa.gov/sse/global/text/22yr_mn_avg_dnr Maximum Direct Radiation (kWh/m^2/day) https://eosweb.larc.nasa.gov/sse/global/text/22yr_mx_avg_dnr Thank you for your assistance! Jtindell on 10 February, 2017 - 12:05

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The author and maintainer listed for dataset http://en.openei.org/datasets/dataset/nasa-sse-global-monthly-average-solar-dni-data is support-asdc@earthdata.nasa.gov, so somebody there should be able to answer your questions. Jayhuggins on 10 February, 2017 - 09:19