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Name

lmtinfo - netCDF4 info and bench reduction procedures

Synopsis

lmtinfo [parameter=value]

Description

lmtinfo should mirror the functionality of sdinfo(1NEMO) and read in some LMT single dish spectral line data, to summarize contents, and perform some baseline benchmarks to keep python competative.

ncdump is a program that comes with the netCDF4 distribution, display a netCDF file to text form (CDL). This format can in return be converted back to netCDF format with the ncgen(1) program, much like the tsf(1NEMO) and rsf(1NEMO) pair of programs in NEMO.

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=
Input netCDF4 file, no default.

Warning

Within the HDF5 distribution there is also an ncdump program, which seems to work on ifproc data, but not on roach.

Examples

Currently not much is displayed. Here are some sample values via ncdum 
 Header.Source.SourceName = "IRC+10216" ;
 Header.Source.Epoch = 2000 ;
 Header.Source.Az = 6.2842931200157, 6.2842931200157 ;
 Header.Source.El = 1.45923390362304, 1.45923390362304 ;
 Header.Source.Ra = 2.56544535942834, 2.56544535942834 ;
 Header.Source.Dec = 0.231758198937406, 0.231758198937406 ;
 Header.TimePlace.LST = 2.36279197218322 ;
 Header.TimePlace.UTDate = 2018.8753210874 ;
 Header.TimePlace.UT1 = 3.09256434074434 ;
 Header.TimePlace.ObsLongitude = -1.69846024688166 ;
 Header.TimePlace.ObsLatitude = 0.331369173683427 ;
 Header.TimePlace.ObsElevation = 4.64 ;
 Header.IfProc.CalObsNum = 79447 ;
 Header.Mode.numchannels = 2048 ;
 Header.Mode.roach_num = 0 ;
 Header.Telescope.ObsNum = 79447 ;
 Header.Telescope.source_name = "IRC+10216" ;
 Header.Telescope.obspgm = "Cal" ;
 Header.Telescope.obspgm = "Map" ;

Data

LMT sequia data is organized in a ifprof and the four spectrometer/roach[0-3] directories. Viz. 
  ifproc/ifproc_2019-10-31_085778_00_0001.nc
  spectrometer/roach3/roach3_85778_0_1_Region_J-K_2019-10-31_073122.nc
  spectrometer/roach1/roach1_85778_0_1_Region_J-K_2019-10-31_073122.nc
  spectrometer/roach2/roach2_85778_0_1_Region_J-K_2019-10-31_073122.nc
  spectrometer/roach0/roach0_85778_0_1_Region_J-K_2019-10-31_073122.nc

Caveats

For unknown reason lmtinfo works fine on ifproc data, but core-dumps/fails on spectrometer data. The ncdump program works fine though.

See Also

ncdump(1) , ncgen(1) , sdinfo(1NEMO)

Files

src/image/cdf/lmtinfo.c

Author

Peter Teuben

Update History


25-Nov-20    V0.1 Created    PJT

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