_____________________________________________________________________ _____________________________________________________________________ HINOTORI Plasma Probe Te,Tn 10-sec Average Data and Software _____________________________________________________________________ _____________________________________________________________________ Hinotori is the 7th Japanese scientific satellite launched on 2/1981 into a low-inclination (31.3 deg.), circular (600 km) orbit. The Hinotori Plasma Probes observed the equatorial topside ionosphere measuring electron density and temperature from February 23, 1981 to June 19, 1982 (solar cycle maximum). More information about the Hinotori mission can be found in hinotori.doc and in the following documents: K-I.Oyama, Electron temperature measurements carried out by Japanese scientific satellites, Advances in Space Research, Volume 11, Number 10, p149-158, 1991. K.-I. Oyama, K. Schlegel, and S. Watanabe, Temperature structure of plasma bubbles in the low latitude ionosphere areound 600 km altitude, Planetary and Space Science, Vol. 36, 553-567, 1988. _____________________________________________________________________ _____________________________________________________________________ DATA FORMAT _____________________________________________________________________ The data are provided as monthly files from February 1981 to June 1982. The filenames are yymm_hinotori_pp_10s.asc, where yy are the last two digits of the year and mm is the month. Each record consists of 30 words and all data are in ASCII format. _____________________________________________________________________ Word Content 1 pass number(orbit) 2 year \ 3 month \ 4 day \ Universal Time 5 hour / Universal Time 6 minutes / 7 second / 8 year \ 9 month \ 10 day \ Local Time 11 hour / Local Time 12 minutes / 13 second / 14 (longitude/deg.) * 100 15 (latitude/deg. ) * 100 16 (geomagnetic latitude/deg.) * 100 17 (altitude/km) * 100 18 delta_t(Ne)/sec, exact time of electron density measurement in UT is word(7)+delta_t, or word(13)+delta_t for LT. 19 electron density(/cm-3) observed by Impedance probe. 20 delta_t(Te)/sec, exact time of electron temperature measurement in UT is word(7)+delta_t, or word(13)+delta_t for LT. *21 electron temperature/K calculated from the floating potential shifts when a rf signal of 0.5V is applied to the Langmuir probe electrode. *22 electron temperature/K calculated from the floating potential shifts when a rf signal of 0.25V is applied to the Langmuir probe electrode. *23 electron temperature/K obtained from the ratio of the two Lanmuir Probe floating potential shifts. 24 satellite potential (mV) 25 \ 26 \ 27 \ Particle data; Use of these data requires consulting the PI 28 / about the specifics of these data. 29 / 30 / _____________________________________________________________________ * It is recommended to use the first of the three given electron temperature values, because it is the most reliable value with only small fluctuation (see also Oyama, 1991). _____________________________________________________________________ _____________________________________________________________________ SOFTWARE _____________________________________________________________________ LTplot.c+/AVE(Te,Tn+averaged values) plot.c(Te,Ne summary plot) _____________________________________________________________________ LTplot.c+/AVE and plot.c ------------------------------------------------------------------- If you have pgplot , you can make a plot of 1 pass TE and Ne data with each average valu easily. It is need to change some lines in the program. 1:include (First line) 2:Hinotori data directry and you must make an averaged data directry named AVE in the directry placed LTplot.c. Before using LTplot.c you must know about orbit number in those datafiles.Because LTplot.c needs datafile (month:ex.8105) and orbit number(ex.1058). ******************************************************************* LTplot.c makes "pgplot.ps" ,one graph of Te and Ne each orbit number with these averaged value (x axis is Local time). ******************************************************************* plot.c makes "pgplot.ps" ,one graph of Te and Ne each orbit number (x axis is U.T). _____________________________________________________________________ _____________________________________________________________________ Note that an FTPHelper interface to this dataset, providing data subsetting and and graphical browsing, is available at "http://nssdc.gsfc.nasa.gov/ftphelper/" -------------------------------------------------------------- Data Contact: Fusako Isoda, Oyama Lab.(4/1995 - 3/1997) fusako@bochan.ted.isas.ac.jp Principal Investigator: Ko-Ichiro Oyama Planetary Atmospheric Physics Branch Institute of Space & Astronautical Science 3-1-1, Yoshinodai, Sagamihara, 229-8510 JAPAN Tel: +81-427-59-8178 Fax: +81-427-59-8457 . e-mail: oyama@bochan.ted.isas.ac.jp NSSDC Contact: Dieter Bilitza dbilitza@pop600.gsfc.nasa.gov _____________________________________________________________________ _____________________________________________________________________