Aerosol Profiles of aerosol extinction are provided at 9 different wavelengths (385, 448, 521, 596, 676, 754, 868, 1019, and ~1550 nm) from the surface or opaque cloud top to an altitude of 40 km, where the contribution due to aerosols becomes negligible at all wavelengths.
In addition, two aerosol products are provided in this list: (1) Stratospheric aerosol optical depth and (2) the ratio of aerosol extinction to the contribution due to molecular scattering at a wavelength of 1019 nm.
Water Vapor Profiles of water vapor are provided in units of concentration from the surface to an altitude of 50 km. A temperature profile retrieved from SAGE III measurements or from a gridded analysis will facilitate computation of relative humidity. The water vapor products are retrieved using a nonlinear least squares approach from the solar occultation measurements of slant path absorption.
Nitrogen Dioxide Profiles of nitrogen dioxide are provided in units of concentration from the tropopause to an altitude of 50 km.
Ozone Three different profiles of ozone are provided in units of concentration over the altitude range 6 to 85 km. One profile is based upon measurements made at short wavelengths in the Hartley-Huggins band and a second profile is based upon measurements made at visible wavelengths in the Chappius band. The third product consists of a composite profile constructed of data from the Chappius band at lower altitudes (below about 55 km) and from the Hartley-Huggins band at higher altitudes (above approximately 55 km). For each of the 3 different ozone products, slant path column density profiles are also included.
Temperature and Pressure The retrieved profiles of temperature and pressure are new products provided by the SAGE III mission. Besides providing a valuable scientific measurement, this data will permit a self-consistent determination of molecular scattering along the limb view which is needed for accurate retrievals of ozone and other species.
A single scan vertical resolution of the lunar Level 2 products is 1 km. The chemical species concentration data from multiple scans are bin-averaged and reported on a geometric coordinate system with a vertical resolution of 0.5 km to maintain grid spacing compatibility with the solar Level 2 products.
Chlorine Dioxide Profiles of chlorine dioxide are provided in units of concentration for an altitude range of 15 - 25 km.
Nitrogen Dioxide Profiles of nitrogen dioxide are provided in units of concentration from 20 to 50 km.
Nitrogen Trioxide Profiles of nitrogen trioxide are provided in units of concentration for the altitude range of 20 - 55 km.
Ozone Profiles of ozone based upon measurements made at visible wavelengths in the Chappius band are provided in units of concentration from 16 to 35 km.
Product | Filename Format |
L1B Solar Transmission Binary Products | g3a.tb.{xxxxxxXXvzz.zz} |
g3a.tbm.{xxxxxxXXvzz.zz} | |
L1B Solar Transmission HDF Products | g3a.t.{xxxxxxXXvzz.zz} |
g3a.tm.{xxxxxxXXvzz.zz} | |
Level 2 Solar Binary Products | g3a.sspb.{xxxxxxXXvzz.zz} |
g3a.sspbm.{xxxxxxXXvzz.zz} | |
Level 2 Solar HDF Products | g3a.ssp.{xxxxxxXXvzz.zz} |
g3a.sspm.{xxxxxxXXvzz.zz} | |
Level 2 Lunar Binary Products | g3a.lspb.{xxxxxxXXvzz.zz} |
g3a.lspbm.{xxxxxxXXvzz.zz} | |
Level 2 Lunar HDF Products | g3a.lsp.{xxxxxxXXvzz.zz} |
g3a.lspm.{xxxxxxXXvzz.zz} | |
Level 2 Cloud Binary Products | g3a.cldb.{xxxxxxXXvzz.zz} |
g3a.cldbm.{xxxxxxXXvzz.zz} | |
Level 2 Cloud HDF Products | g3a.cld.{xxxxxxXXvzz.zz} |
g3a.cldm.{xxxxxxXXvzz.zz} |
Where
Tag | Description |
t | Level 1B transmission profiles |
ssp | Level 2 Solar species profiles |
lsp | Level 2 Lunar species profiles |
cld | Level 2 Cloud product |
{xxxxxxXX} | Event ID (6 digit orbit number, 2 digit event type) |
{vzz.zz} | Software version number |
[shortname.versionid] / [acquisitiondate], where:[shortname.versionid] is the collection identifier. (e.g., g3alsp.002).
Data files in HDF-EOS format are stored in the appropriate directory based on collection and acquisition date. Corresponding metadata files in Extensible Markup Language (XML) format are also stored in the appropriate directory.
NOTE: The SAGE III data was downloadded from the EOS Data Gateway, Langley DAAC Data Pool and it should be noted that the version number on that system represents the Earth Science Data Type version rather than the SAGE III Data version. Accordingly, the newly-released V3 data is stored as version '002'.