Added descriptive text requested by John Walker.
Added descriptive text requested by John Walker.

mwernimont/glri-catalog,ee-usgs/glri-catalog,mwernimont/glri-catalog,USGS-CIDA/glri-catalog,jlucido2/glri-catalog,jlucido2/glri-catalog,jlucido2/glri-catalog,ee-usgs/glri-catalog,mwernimont/glri-catalog,ee-usgs/glri-catalog,USGS-CIDA/glri-catalog,USGS-CIDA/glri-catalog