Data Access
The EUV Grating Spectrograph (EGS) aboard SEE performs measurements of the Sun for about 3 minutes every orbit (97 minutes) which usually gives 14-15 measurements per day. 4x per year, in-between direct solar measurements, the SEE instrument has opportunities to observe the solar irradiance transmitted through the atmosphere. The Level 2B EGS Occultation data is time averaged over each measurement and divided by the average of the previous and next solar observations. The EGS resolution is about 0.4 nm, but the data product is sampled at 0.1 nm with valid data ranging from ~27-190 nm.
Version:2.2.1
The EUV Grating Spectrograph (EGS) aboard SEE performs measurements of the Sun for about 3 minutes every orbit (97 minutes) which usually gives 14-15 measurements per day. 4x per year, in-between direct solar measurements, the SEE instrument has opportunities to observe the solar irradiance transmitted through the atmosphere. The Level 2B EGS Occultation data is time averaged over each measurement and divided by the average of the previous and next solar observations. The EGS resolution is about 0.4 nm, but the data product is sampled at 0.1 nm with valid data ranging from ~27-190 nm.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Thomas.N.Woods |
This web page allows the request of data files for this product. To request data: for the EGS_2B data type of interest, click the year of interest to go the the ftp directory of files and download the desired day-long file by clicking on it.
Atmospheric transmission through the tangent ray point (Note
that due to finite and variable instrument precision, this value may exceed 1.)
Transmissions are calculated by averaging 6-8 transmission measurements and dividing
by the average of approximately 20 direct solar measurements from the previous
orbit with 20 additional direct solar measurements from the next orbit.