******************************************************************************* ***** ***** ***** README file for one-minute magnetic field database ***** ***** of the 210 (deg) meridian chain ***** ***** ***** ***** November 26, 1998, written by K. Shiokawa and K. Yumoto ***** ***** (STE Lab., Nagoya Univ.) ***** ***** ***** ***** contact address : ***** ***** Solar-Terrestrial Environment Laboratory, Nagoya University ***** ***** 3-13 Honohara, Toyokawa, Aichi 442-8507, JAPAN ***** ***** Tel: 81-533-89-5168, Fax:81-533-89-1539 ***** ***** E-mail: shiokawa@stelab.nagoya-u.ac.jp ***** ***** ***** ******************************************************************************* Thank you for your collaborations using the 210 (deg) MM (magnetic meridian) magnetic field data !!! This is the README file for one-min value data file. Please read this file carefully before using the data base. ----- 1. Rules for Data Use -------------------------------------------- Please contact the principal investigator, Professor K. Yumoto, Kyushu University, before using the data at any publication and/or presentation. If the data is essential to your research, the PI will require coauthorship, acknowledgements, and related references. These collaborations are very important for the continuation of the 210 MM project. Reference: Yumoto, K., and the 210 (deg) MM Magnetic Observation Group, The STEP 210 (deg) magnetic meridian network project, J. Geomag., Geoelectr., 48, 1297-1309, 1996. ----- 2. File Format ---------------------------------------------------------- Each one data file corresponds to the data from one station during one day. The data are located under the directory of each year and each station. For example, the data obtained at the Mosiri Observatory, are in the directory of /1991/msr. File name is as follows. File_Name: A5yymmdd.stn yy: year mm: month dd: day stn: station name For example, the data file obtained at Mosiri on December 8, 1991, is named as A5911208.msr. Data format inside files is basically the same as that of WDC-A tape exchange format, where there are no absolute values of magnetic field, that is, block_structure/1hour (400character) NPD|LONG|YR |MO |DA |E |HR |OBS |ORG|BLANKS|DATA-1|..|DATA-60|HR_MEAN| 1-6|7-12|13-14|15-16|17-18|19|20-21|22-24|25 |26-34 |35-40 |..|389-394|395-400| file_structure |..E=X(H-component)..HR=0..|.. ..|..E=X(H)..HR=23..| (400+1)x24=9624character |..E=Y(D-component)..HR=0..|.. ..|..E=Y(D)..HR=23..| (400+1)x24=9624character |..E=Z(Z-component)..HR=0..|.. ..|..E=Z(Z)..HR=23..| (400+1)x24=9624character (+1 Byte is CR) total file size =401x24x3=28872 byte/1day (1 character= 1 Byte). Data are in ASCII format. *NPD is the observatory's North Polar Distance (0 deg to 180 deg) from the north geographic pole in thousandths of a degree and is allotted 6 characters. Decimal point is implied between positions 3 and 4. *Long is the geographic longitude (0 deg to 360 deg) measured EAST from Greenwich in thousandths of a degree and also has a 6 character field. Decimal point is implied between positions 9 and 10. *YR, MO, DA, and HR are each 2-digit numbers giving the data and GMT. *E is the element symbol in 1 character; it may be X, Y, or Z. !!!!!!! Please note that X is H-component and Y is D-component in the 210 MM data. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! *OBS is the 3 letter abbreviation for the observatory. *ORG is origin of data. In this data base, ORG is blank. *BLANKS are 10 character spaces reserved for future additions. Now, it is filled by '0.1nT ', which indicates unit of the data. *DATA-1...-60 are one-minute values of the given element. Unit is 0.1 nT. *HR MEAN is the average of the preceeding 60 one-minute values in unit of 0.1 nT. *Each element value and the hourly mean are given in a six-digit field including a minus sign for negative values or blank for positive values. The abbreviations of stations are as follows. STN(DATABASE) STN(PAPER*) Station name NPD(deg) LONG(deg) TIX - TIXIE 18.42 129.00 CKD CHD CHOKURDAKH 19.38 147.89 MGD MGD MAGADAN 30.03 150.86 PTK PTK ST. PARATUNKA 37.06 158.25 MSR MSR MOSIRI 45.63 142.27 ONW - ONAGAWA 51.57 141.47 KAG KAG KAGOSIMA 58.52 130.72 CBI CBI CHICHIJIMA 62.85 142.30 EWA EWA EWA BEACH 68.68 202.00 GAM GUA GUAM 76.42 144.87 BIK - BIAK 91.08 136.05 WWK WEW WEWAK 93.55 143.62 DRW DAW DARWIN 102.40 130.90 WEP WEP WEIPA 102.68 141.88 LEM LMT LEARMONTH 112.22 114.10 BRV BSV BIRDSVILLE 115.83 139.33 DLB DAL DALBY 117.18 151.20 ADL ADE ADELAIDE 124.67 138.65 MCQ - MACQUARIE IS. 144.50 158.95 *PAPER : Yumoto et al.(J. Geomag. Geoelectr, p.261, 1992). ----- 3. Data Quality --------------------------------------------------------- a) Directions of magnetic sensors are as follows. (1) for all data from MSR, ONW, KAG, EWA, GUA, TIK, CHD, MGD, PTK, and ADL, and for data from WEP before 05UT on Jan. 31, 1991 [H:+ = northward] [D:+ = eastward] [Z:+ = downward] (2) for all data from BSV, LMT, DAW, BIK, MCQ, and DAL, and for data from WEP after 05UT on Jan. 31, 1991 [H:+ = northward] [D:+ = eastward] [Z:+ = upward] (3) for data from CBI [H:+ = northward] [D:+ = westward] [Z:+ = downward] (4) for data from WEW [H:+ = northward] [D:+ = westward] [Z:+ = upward] b) Some other remarks (1) The time of the data from BSV for Nov. 24, 1992 - Dec. 7, 1992 is 10 hour behind the correct time. (2) The Z-component of BSV data sometimes becomes zero due to a temporal disconnection of cable. (3) The Z-component of ADL data sometimes shows noisy fluctuations due to an equipment problem. (4) The Z-component of DAL data is meaningless after Jan. 1, 1993. (5) The D- and Z-components of MSR data have a DC-level, artificial fluctuation on a few days/year. (6) ADL is the Adelaide station (ADE). (7) The time of the data from BSV for Nov. 2, 1991 - Nov. 16, 1991 is 1 hour faster than the correct time. (8) The H-component of EWA data sometimes shows noisy fluctuations due to an equipment problem (9) The D-component of DAL data satulate for April 13, 1992 - July 10, 1992 ------------------------------------------------------------------------------- If you have any questions or comments on the database, please feel free to contact with K. Shiokawa, STE lab., Nagoya Univ. ------------------------------------------------------------------------------- c----------------------------------------------------------------- c c Sample FORTRAN program to read the c one-minute ascii data of 210 chain c c November 21, 1998 written by Kazuo Shiokawa c Solar-Terrestrial Environment Laboratory c Nagoya University c 3-13, Honohara, Toyokawa, Aichi 442-8507, Japan c E-mail: shiokawa@stelab.nagoya-u.ac.jp c c------------------------------------------------------------------ subroutine r_kyotob(iyr, mon, idm, aobs, b) c integer intmag(60) real*4 b(3, 1440) character*1 bcomp character*3 aobs c do icomp = 1, 3 do jhr = 1, 24 read(11, 600) iyr, mon, idm, bcomp, ihr, aobs, intmag 600 format(12x, i2, i2, i2, a1, i2, a3, 10x, 60i6) do min = 1, 60 n = 60*float(jhr-1) + min b(icomp, n) = float(intmag(min))*0.1 end do end do end do c return end c-----------------------------------------------------------------