GLHYANC v001

G-LiHT Hyperspectral Ancillary


PI: Bruce Cook

Description

Goddard’s LiDAR, Hyperspectral, and Thermal Imager (G-LiHT) mission utilizes a portable, airborne imaging system that aims to simultaneously map the composition, structure, and function of terrestrial ecosystems. G-LiHT primarily focuses on a broad diversity of forest communities and ecoregions in North America, mapping aerial swaths over the Conterminous United States (CONUS), Alaska, Puerto Rico, and Mexico.

The purpose of G-LiHT’s Hyperspectral Ancillary data product (GLHYANC) is to provide information related to aircraft attitude and altitude, view and solar angles, and other ancillary reflectance and radiance data.

GLHYANC data are processed as a zipped raster data product (GeoTIFF) with associated header file (.hdr) at 1 meter spatial resolution over locally defined areas.

read more

Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionG-LiHT
DOI10.5067/Community/GLIHT/GLHYANC.001
File Size>1 GB
Temporal Resolution
Temporal Extent2011-06-30 to Present
Spatial ExtentNorth America
Coordinate SystemUniversal Transverse Mercator (UTM)
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic DimensionsVariable

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers12
Columns/RowsVariable
Pixel Size1 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
day of year day of year Julian day 32-bit floating point N/A N/A 0 to 366 N/A
aircraft elevation aircraft elevation Meters 32-bit floating point N/A N/A 0 to 1500 N/A
aircraft altitude AGL aircraft altitude Above Ground Level (AGL) Meters 32-bit floating point N/A N/A 0 to 1000 N/A
modeled clear-sky irradiance modeled clear-sky irradiance W/m² 32-bit floating point N/A N/A 0 to 2000 N/A
solar zenith angle solar zenith angle Degree 32-bit floating point N/A N/A -180 to 180 N/A
solar azimuth solar azimuth Degree 32-bit floating point N/A N/A 0 to 360 N/A
observed incoming PAR observed incoming photosynthetically active radiation (PAR) W/m² 32-bit floating point N/A N/A 0 to 1500 N/A
clearness index clearness index N/A 32-bit floating point NA N/A 0 to 1 N/A
view angle view angle Degree 32-bit floating point N/A N/A 0 to 360 N/A
view azimuth view azimuth Degree 32-bit floating point N/A N/A 0 to 360 N/A
swath number swath number Number 32-bit floating point N/A N/A N/A N/A
GLT flag Geographic Lookup Table (GLT) flag Number 32-bit floating point N/A N/A 0, 1 N/A

Product Quality

Information on the GLHYANC product can be found on the G-LiHT website.


About the image

"Cockpit in the small aircraft" by Trendhim is licensed under CC BY-NC-SA 2.0, accessed from Creative Commons, Feb 4, 2022.

View full-size image

Documentation

User Guide

Using the Data

Access Data

Citation

DOI: 10.5067/Community/GLIHT/GLHYANC.001