date: Fri Apr 25 16:11:28 2008 from: Tim Osborn subject: Re: rd0 programs to: Ian Harris ok -- I'll make some new 2.5 degree normals files for pre, in Mark's binary format so they should be able to be "slotted in". will let you know when they're ready. Cheers Tim At 15:57 25/04/2008, you wrote: Hi Tim, There are two rd0 programs. Here's an extract from my big READ_ME diary/file, from a year or so ago: 20. Secondary Variables - Eeeeeek!! Yes the time has come to attack what evenTim seems to have been unhappy about (reading between the lines). To assist me I have 12 lines in the gridding ReadMe file.. so par for the course. Almost immediately I hit that familiar feeling of ambiguity: the textsuggests using the following three IDL programs: frs_gts_tdm.pro rd0_gts_tdm.pro vap_gts_anom.pro So.. when I look in the code/idl/pro/ folder, what do I find? Well: 3447 Jan 22 2004 fromdpe1a/code/idl/pro/frs_gts_anom.pro 2774 Jun 12 2002 fromdpe1a/code/idl/pro/frs_gts_tdm.pro 2917 Jan 8 2004 fromdpe1a/code/idl/pro/rd0_gts_anom.pro 2355 Jun 12 2002 fromdpe1a/code/idl/pro/rd0_gts_tdm.pro 5880 Jan 8 2004 fromdpe1a/code/idl/pro/vap_gts_anom.pro In other words, the *anom.pro scripts are much more recent than the *tdmscripts. There is no way of knowing which Tim used to produce the current public files. The scripts differ internally but - you guessed it! - the descriptions at the start are identical. WHAT IS GOING ON? Given that the'README_GRIDDING.txt' file is dated 'Mar 30 2004' we will have to assumethat the originally-stated scripts must be used. I've just reviewed the rd0_gts_anom.pro file, and sure enough, it is designed to read precip anomalies. specifically, it contains this line in both the 61-90 and full sections: pregrd(nland)=((pregrd(nland)/100.0)+1.0)*prenorm(nland) ; make pre anom into abs There is nothing comparable in rd0_gts_tdm.pro. So.. I'll have a play with this! Bearing in mind that the precip normals are probably up the creek.. Cheers Harry Ian "Harry" Harris Climatic Research Unit School of Environmental Sciences University of East Anglia Norwich NR4 7TJ United Kingdom