"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 imageGoddard’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.
Metadata for individual flights is available as a pdf file and can be accessed through the Documentation button on this landing page. It contains information related to flight plans, acquisition details, field observations, and instrument specifications.
| Characteristic | Description |
|---|---|
| Collection | G-LiHT |
| DOI | 10.5067/Community/GLIHT/GLHYANC.001 |
| File Size | >1 GB |
| Temporal Resolution | |
| Temporal Extent | 2011-06-30 to Present |
| Spatial Extent | North America |
| Coordinate System | Universal Transverse Mercator (UTM) |
| Datum | World Geodetic System (WGS84) |
| File Format | GeoTIFF |
| Geographic Dimensions | Variable |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 12 |
| Columns/Rows | Variable |
| Pixel Size | 1 m |
| 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 |
Information on the GLHYANC product can be found on the G-LiHT website.