The NASA ER-2 parameters are listed at:
http://www.nasa.gov/centers/dryden/aircraft/ER-2/NAVREC/FY12/IWG1definition.html
This URL provides complete parameter names.

The URL ftp://gpm.nsstc.nasa.gov/gpm_validation/iphex/NAV_ER2/doc/IWG1_Packet_Definition.pdf provides information
including the units and range. Parameter names are abbreviated.