;+
; NAME:
;  wr_2_position
; PURPOSE: (one line)
;  Write the beam positions
; DESCRIPTION:
;  Write a short log
;  tables/YYMMDD_2_position_SETNO.txt
; CATEGORY:
;  NIRES reduction
; CALLING SEQUENCE:
;  wr_2_position, datestr, set
; INPUTS:
;  datestr: string (YYMMDD)
;  sets: array of set structures
;  nset: number of sets
; OUTPUTS:
; SIDE EFFECTS:
;  write tables/YYMMDD_2_position_SETNO.txt
; RESTRICTIONS:
;  tables directory must exist
; PROCEDURE:
; MODIFICATION HISTORY:
;  Written 2021 Dec 30, by Leslie Young, SwRI
;-
pro wr_2_position, datestr, set

  deg = !dpi/180.d
  arcsec = deg / 3600.d  

  format1 = '("# set number ", I3, " ", A-12, F8.3, " seconds")'
  forms = '(A5," ",A-12," ", A-7," : ", A1," / ",A1,"  ", A7,  ",",A7, "  ", A7,  ",",A7,",",A7, "  ", A10, A10)'
  formp = '(I5, " ",A-12," ", A-7," : ", I1," / ",I1,"  ", F7.3,",",F7.3,"  ", F7.3,",",F7.3,",",F7.3, "  ",A10, A10)'

  fn = 'tables/'+datestr+'_2_position_'+string(set.setno, form='(I03)')+'.txt'
  openw, lun, fn, /get_lun
  !textunit = lun
  printf, lun, set.setno, set.object, set.itime, $
          format = format1
  printf, lun, 'Frame', 'OBJECT', 'PATTERN','i','N', 'XOFFSET', 'YOFFSET', 'EAST', 'NORTH', 'D',  'POSITION', 'OVERRIDE', $
          format=forms

  foo = rdsets(datestr, set.framenum0, set.n, h, /nodata, object=object, $
                targra=targra, targdec=targdec, ra=ra, dec=dec, $
                xoffset=xoffset, yoffset=yoffset, $
                dpatipos=dpatipos, dpatnpos=dpatnpos, dpatname=dpatname)
  framenum = set.framenum0 + lindgen(set.n)
  rd2xieta, targra*deg, targdec*deg, ra*deg, dec*deg, xi,eta
  d = sqrt(xi^2+eta^2)/arcsec
  if strtrim(dpatname[0],2) eq 'ABBA' then begin
     beam = (['ABEAM','BBEAM'])[yoffset lt 0]
  endif else begin
     beam = (['CENTER','SKY'])[sqrt(xi^2+eta^2) gt 8.*arcsec]
  endelse
  forprint, framenum, object, dpatname, dpatipos, dpatnpos, xoffset, yoffset, xi/arcsec, eta/arcsec, d, beam, beam, $
            format=formp, textout = 5, /nocomment
  close, lun & free_lun, lun
      
end