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| Variable | Meaning | Possible values |
| variab | variable name (varno in ODB) | Integer value |
| vert_co | type of vert. coord. | Integer value |
| press | pressure (hPa) | Real value |
| press_rl | ref. level press. (hPa) | Real value |
| ppcode | synop press. code | Integer value |
| obs_value | observed value | Real value |
| fg_departure | first guess depart. | Real value |
| obs_error | observation error | Real value |
| fg_error | first guess error | Real value |
| winchan_dep | window chan dep | Real value |
| obs_t | Obs temperature at same level, for R/S only. | Real value |
| elevation | Radar elevation | Real value |
| winchan_dep2 | alternative window chan dep | Real value |
| tausfc | Surface transmittance for AIRS screening. | Real value |
| csr_pclear | percentage of clear pixel (GEOS) | Real value |
2.2 Keywords
Keywords are fixed values against which certain variables are compared. They should be consistent with the IFS definitions. A list of keywords that are currently defined in the blacklist (in the external file of our blacklist). Adding new keywords is straightforward.
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!
! Written by an automatic conversion program, version 3
!
!
! File converted from the file "old"
!
! FAILCODE :
const monthly = 1;
const constant = 2;
const experimental = 3;
const whitelist = 4;
! OBSTYP :
const synop = 1;
const airep = 2;
const satob = 3;
const dribu = 4;
const temp = 5;
const pilot = 6;
const satem = 7;
const paob = 8;
const scatt = 9;
! CODTYP : none
! INSTRM : none
! VARIAB :
const u = 3;
const v = 4;
const z = 1;
const dz = 57;
const rh = 29;
const q = 7;
const pwc = 9;
const rh2m = 58;
const t = 2;
const td = 59;
const t2m = 39;
const td2m = 40;
const ts = 11;
const ptend = 30;
const w = 60;
const ww = 61;
const vv = 62;
const ch = 63;
const cm = 64;
const cl = 65;
const nh = 66;
const nn = 67;
const hshs = 68;
const c = 69;
const ns = 70;
const s = 71;
const e = 72;
const tgtg = 73;
const spsp1 = 74;
const spsp2 = 75;
const rs = 76;
const eses = 77;
const is = 78;
const trtr = 79;
const rr = 80;
const jj = 81;
const vs = 82;
const ds = 83;
const hwhw = 84;
const pwpw = 85;
const dwdw = 86;
const gclg = 87;
const rhlc = 88;
const rhmc = 89;
const rhhc = 90;
const n = 91;
const snra = 92;
const ps = 110;
const dd = 111;
const ff = 112;
const rawbt = 119;
const rawra = 120;
const satcl = 121;
const scatss = 122;
const du = 5;
const dv = 6;
const u10m = 41;
const v10m = 42;
const rhlay = 19;
const auxil = 200;
const cllqw = 123;
const scatdd = 124;
const scatff = 125;
! LSMASK :
const sea = 0;
const land = 1;
! PPCODE :
const psealev = 0;
const pstalev = 1;
const g850hpa = 2;
const g700hpa = 3;
const p500gpm = 4;
const p1000gpm = 5;
const p2000gpm = 6;
const p3000gpm = 7;
const p4000gpm = 8;
const g900hpa = 9;
const g1000hpa = 10;
const g500hpa = 11;
! VERT_CO:
const pressure = 1;
const height = 2;
const tovs_cha = 3;
const scat_cha = 4;
...
! External variables (non-special):
external obstyp;
external_CHAR statid;
external codtyp;
external instrm;
external date;
external time;
external lat;
external lon;
external stalt;
external modoro;
external lsmask;
external rad;
! External variables (SPECIAL):
external variab is SPECIAL;
external vert_co is SPECIAL;
external press is SPECIAL;
external press_rl is SPECIAL;
external ppcode is SPECIAL;
external obs_value is SPECIAL;
external obs_departure is SPECIAL;
external modps is SPECIAL;
...
if ( OBSTYP = synop ) then
if VARIAB in ( z, ps )
and STATID = " 3ELC"
then fail(); endif;
if VARIAB in ( z, ps, u10m, v10m )
and STATID = " ELBX3"
then fail(); endif;
return; endif;
if ( OBSTYP = airep ) then
if (VARIAB = t)
and STATID in ( " N503US", " UAL...")
then fail(); endif;
return; endif;
if ( OBSTYP = satob ) then
if STATID in ( " 0//", " 024")
then fail(); endif;
return; endif;
if ( OBSTYP = dribu ) then
if VARIAB in ( z, ps, u, v )
and STATID = " 46527"
then fail(); endif;
return; endif;
if ( OBSTYP = temp ) then
if (VARIAB = z)
and STATID = " ERES"
then fail(); endif;
return; endif;
if ( OBSTYP = pilot ) then
if VARIAB in ( u, v )
and STATID = " 08221"
then fail(); endif;
return; endif;
if ( OBSTYP = satem ) then
if STATID = " 201"
then fail(); endif;
return; endif;
5.2 A more complex example
...
if ( OBSTYP = synop ) then
if VARIAB in ( z, ps )
and STATID in ( " ATQM", " ATRK", " ATSR", " C6BB", " C6QK")
then fail(); endif;
return; endif;
if ( OBSTYP = airep ) then
if ( 50 >= PRESS >= 10 )
and STATID = " AN..."
then fail(); endif;
if ( ( LAT < -90 or LAT > 90 ) or ( -80 < LON < -40 ) )
and STATID = " NWA74"
then fail(); endif;
return; endif;
if ( OBSTYP = satob ) then
if ( ( LAT < -50 or LAT > 50 ) or ( -170 < LON < 90 ) )
and STATID = " 104"
then fail(); endif;
if ( ( LAT < -50 or LAT > 50 ) or ( LON < -50 or LON > 50 ) )
and ( 1000 >= PRESS >= 401 )
and STATID = " 035"
then fail(); endif;
return; endif;
if ( OBSTYP = temp ) then
if (VARIAB = z)
and ( 100 >= PRESS >= 10 )
and ( 110000 <= TIME <= 130000 )
and STATID = " 20674"
then fail(); endif;
if VARIAB in ( u, v )
and ( 50000 <= TIME <= 70000 )
and STATID = " 40179"
then fail(); endif;
return; endif;
if ( OBSTYP = pilot ) then
if VARIAB in ( u, v )
and ( 50000 <= TIME <= 70000 )
and STATID = " 40179"
then fail(); endif;
return; endif;
5.3 Adding completely new variable to the system
...