pro read_nchead, infile, hd, platform, instrument, experiment
;====================================================
; Check arguments
;====================================================
  if n_elements(infile) eq 0 then begin
    print, 'Provide input file name'
    progexit
  endif

  dummy = findfile(infile, count=count)
  if (count eq 0) then begin
    print,'Input file: '+infile+' cannot be found'
    progexit
  endif

;make return header array
  hd = fltarr(6)

;open the netcdf file
  ncid = ncdf_open(infile)

;get the number of data records
  vid = ncdf_dimid( ncid, 'record')
  ncdf_diminq, ncid, vid, dn, ds
  hd[0] = ds

;get the site name
  ncdf_attget,ncid,/global,'site_name',val
  platform = string( val )

;get the instrument name
  ncdf_attget,ncid,/global,'instrument_name',val
  instrument = string( val )

;get the experiment name
  ncdf_attget,ncid,/global,'experiment_name',val
  experiment = string( val )

;close the netcdf file
  ncdf_close, ncid

;========================================
return
end