Why are laser footprint shape parameters not available for low energy campaigns?
Several parameters help quantify the shape of the GLAS laser footprint, which change slightly for each campaign. These parameters are:
| GLAS HDF5 Parameter | GLAS HDF5 Parameter Description | GLAS HDF5 Data Set |
| d_tpintensity_avg | Transmit pulse intensity - frame average | GLAH14, GLAH15 |
| d_tpazimuth_avg | Transmit pulse azimuth - frame average | GLAH06 |
| d_tpeccentricity_avg | Transmit pulse eccentricity - frame average | GLAH14, GLAH15 |
| d_tpmajoraxis_avg | Transmit pulse major axis - frame average | GLAH14, GLAH15 |
These parameters are valid on most campaigns, but in the later campaigns (after Laser 2D), the laser energy was too weak to be able to compute the pulse shape, resulting in values of 0. More details about these parameters can be found in the GLAH06 Product Data Dictionary.
Last Updated Aprili 2020