The Atmospheric Library is made up of an extensive set of integrated atmospheric data bases created by the Atmospheric Generator Model (AGM). The library provides meteorological inputs from control fields, generated fields, mesoscale fields to global meteorological fields. The library includes opaque clouds, cirrus clouds, aerosol backscatter, molecular and aerosol attenuation, atmospheric turbulence and terrain. The AGM can create three types of atmospheric files: Global Atmospheric Data Set, Mesoscale Atmospheric Data Set (MADS) and Pure/Spectral Atmospheric Data Set (PADS).
GLOBAL ATMOSPHERIC DATA SET (GADS)
The Atmosphere Generator Model (AGM) creates Global Atmospheric Data Sets (GADS) that the LSM uses for global type simulations. The LSM retrieves atmospheric profiles as a function of latitude and longitude for each laser shot. Each profile contains either an ECMWF T106 or an ECMWF T213 Nature Run atmospheric profile, aerosol and molecular optical properties, cloud information and terrain. A GADS is a FORTRAN 90 direct access file created by using the ECMWF data in liaison with the AGM optical property models, cloud models, and terrain data set. The spacial resolution of a T106 based data set is 125 km by 125 km with a temporal resolution of 3 hours. It contains 32,828 grid area profiles (records) per time period. Currently the atmospheric library contains 10 days of T106 based GADS. The spacial resolution of a T213 based data set is 62.5 km by 62.5 km with a temporal resolution of 6 hours. It contains 205,440 grid area profiles (records) per time period. Currently the atmospheric library contains 3 days of T213 based GADS. It is planned to create 30 days of T213 based GADS by summer 1998.
MESOSCALE ATMOSPHERIC DATA SET (MADS)
The Atmosphere Generator Model (AGM) creates Mesoscale Atmospheric Data Sets (MADS) that the LSM uses for meso-scale type simulations. The LSM retrieves atmospheric profiles as a function of latitude and longitude for each laser shot. Each profile contains an ETA atmospheric profile, aerosol and molecular optical properties, cloud information and terrain. A MADS is a direct access file created by using the ETA data in liaison with the AGM optical property models, cloud models and terrain data set. The spacial resolution of the data set is 30 km by 30 km with a temporal resolution of 3 hours. It contains 20301 grid area profiles (records) per time period.
PURE/SPECTRAL ATMOSPHERIC DATA SET (PADS)
The AGM library provides a probabilistic aerosol backscatter profile, a molecular attenuation profile, a "zig-zag" wind shear profile, sub-pulse scale turbulence, and a correlated horizontal wind field within a 100x100x15 km3 volume for simple trade studies. There are no cloud or terrain effects in a PADS.
| This page managed by Sidney A. Wood | Last modified: 21 Feb. 1998 |