lbtm-minnis: Minnis Cloud Products Using LBTM Algorithm

General Data Description

The Layered Bispectral Threshold Method (LBTM) uses the 0.65um and 10.8 um channel data from the Visible Infrared Spin Scan Radiometer (VISSR) on board the Geostationary Operational Environmental Satellites (GOES). Pre-designated clear-sky visible and infrared thresholds determine whether a pixel is clear or cloudy. Clouds are classified into three height bins (layers): low (0 to 2 km), middle (2 to 6 km), and high (6 km to tropopause). The process retrieves cloud optical properties by comparison with parameterized radiative transfer model calculations. It requires: atmospheric profiles from Numerical Weather Prediction (NWP) models or in situ observations; narrowband to broadband flux conversion functions; surface characterization from Cloud and Earth’s Radiant Energy System (CERES) water percent map.

Measurement Description

Besides top of atmosphere (TOA) shortwave broadband albedo and longwave broadband flux, key derived quantities are cloud properties like optical depth, cloud fraction, effective cloud particle radius, etc.

Temporal Coverage

GOES7 1994-04-05/1994-11-15
GOES8 1995-07-15/2003-03-31
GOES12 2003-04-01/2003-08-31

GMS5 1998-01-03/2003-05-21

Area Covered

32N-42N, 91W-105W
goes#minnisX1.c1: 28×20 0.5 deg grid cells around Central Facility
goes#minnis-acfX1.c1: 3×3 0.3 deg grid cells around Central Facility

Darwin: 5S-17S, 125E-136E
Manus: 1.5S-2.5S, 147E-148E
Nauru: 0-1S, 166.5E-167.5E
Entire TWP Domain: 10N-20S,120E-180
lbtm3minnisX1.c1: 60×30 1 deg grid cells over TWP

Related Links

NASA/Langley Cloud and Radiation Research (Minnis Group) Home Page
Satellite Imagery and Cloud Products


NASA/Langley Cloud and Radiation Research (Minnis Group)