Notes on the dynasonde soundings on this disk (CD-TR088) Notes specific to this disk: ============================ Heating experiments on 12, 16, 19, 20, 21, 23 June 2003 IDI frequency was changed from 3.15 to 3.14 MHz at 0930 UT on 17 June 2003. ---------------------------------------------------------- General notes: ============== The data are from the Tromso dynasonde. Sounding raw data ================= The soundings are stored in directories according to the month of recording. In some cases the soundings for a month are spread over more than one directory e.g. DEC1994a and DEC1994B. In the listings of soundings (files with extension .DIR) the dates and times were read from the soundings and should be as accurate as the dynasonde PC clock at the time of data taking. A few files which show a date as 19700101 have a corrupted time/date. The soundings are listed according to type in files B-MODES.DIR, I-MODES.DIR, K-MODES.DIR, P-MODES.DIR, as well as a total listing in LIST-ALL.DIR Note that P-mode soundings that raw data soundings of type I- or B-mode, although also "P-mode" are usually named *.IPG or *.BPG and are numbered and catalogued as I or B-mode. The CALIBS.DIR shows where calibration soundings (with file extension NOT *.?_? , usually of type *.?r?) are stored. The GAPS-x.TXT files show missing soundings (or repeated sounding numbers) for the four various modes of sounding (b,i,k,p). Bill Wright's Auto DSND analysis: ================================= The results of this analysis are saved under the directory dsnd_jww. The numerical results are in tables of the type DSNDYYMM.ext where YY and MM are year and month. The extensions are .ase: Mean E-region parameters, a line per sounding .asf: Mean F-region parameters, a line per sounding .fef: E- and F-layer penetration frequencies, a line per sounding .spr: Spread echo parameters for E and F regions, a line per sounding .txt: General output from the Autodsnd program .pen: Parameters derived from POLAN, a line per sounding .poe: POLAN Valley, Peak, and error log .pol: The actual POLAN true height inversions (since 12 March 2003). Graphical output (.gif files) are stored in the subdirectories DSNDi for ionograms. Zipped files are stored, one per day. IDI data ======== The results from the IDI ("Imaging Doppler Interferometry") soundings are included. Since 2 May 1999, this mode has been running between interspersed between the B-mode soundings. The original P-mode soundings on which they are based are not recorded, nor are the P-mode sounding numbers incremented. The results, together with some analysis/potting IDL scripts are in the directory IDI_RSLT. A byproduct of these soundings are possible meteor echoes. They are recoded in the directory METEORS together with some IDL plotting scripts. The software running in Tromso is an implementation of that written by Owen Jones of BAS for use at Halley Bay. Information on the IDI technique is found in notes in the file idi_note.wpd. In brief: the yyyymmdd.ivb file is the day's results in binary file format. The yymmddbn.zip files contain the individual day's "parameter files" in binary format. From CD-TR070 the .dat files are also stored. This was previously not done. From about 30 Sept 2002 the absolute power for the whole range extent of the IDI (P-mode) soundings are saved as IDL3.61 SAVE files in the :\idirslt\powr-sav directory, and postscript plots are also saved in zipped files called mspw0210.zip (MeSospheric PoWer YYMM) in the :\idirslt directory. There are some IDL scripts which can handle these data. ***********************************************************