Real time commands can be found here.
Both the uvs and euv command dictionaries can be found here.
The descriptions of uvs and euv instrument timing will give you a general description of how the instrument timing and data work. EUV: http://lasp.colorado.edu/pdr/galileo/ancillary_info/Instrument_info/EUV_instrument/GLL_EUV_Timing_desc.pdf UVS: http://lasp.colorado.edu/pdr/galileo/ancillary_info/Instrument_info/UVS_instrument/GLL_UVS_Timing_diagram_1995.pdf
For an introduction to how the euv and uvs so that you have enough information to do basic plots and data processing on the data. EUV: http://lasp.colorado.edu/pdr/galileo/general_info/HOW_TO/how_to_look_at_euv_data.doc_4 UVS: http://lasp.colorado.edu/pdr/galileo/general_info/HOW_TO/how_to_look_at_uvs_data.doc_4