Documentation Package for ISEE 1 Data Set 77-102A-01N: Solar Wind Ion Moments from the Los Alamos Cross-Fan Analyzer This digital copy was entered from printed copy by H. K. Hills; July, 1994. NSSDC Technical Reference File (TRF) ID = B44509. --------------------------------------------------------------------------- Los Alamos Date: 19 June 1989 Los Alamos National Laboratory In Reply Refer to: ESS-8:89-35-607 Los Alamos, New Mexico 87545 Mail Stop: D438 Telephone: (505) 667-5389 Dr. Sumant Krishnaswamy Code 633 NSSDC NASA/Goddard Space Flight Center Greenbelt, MD 20771 Dear Sumant: Under separate cover I am sending you one magnetic tape containing high temporal resolution solar wind ion moments derived from measurements obtained by the Los Alamos X-Fan Solar Wind Ion Experiment on ISEE-1. The tape contains 7 files, 1 for each of the solar wind seasons (roughly July through December) from 1977 through 1983. The temporal resolution of these data is 24 seconds in high data rate and 48 seconds in low data rate. Each data record in these files contains the date (YYMMDD), universal time in seconds, universal time in HHMMSS, the proton density (cm**-3), flow speed (km/sec), flow azimuth (degs., with 0 deg. corresponding to flow from the sun [corrected for aberration] and positive azimuths corresponding to flow toward dawn), flow latitude (degs., with positive latitudes corresponding to flow toward the south), the minimum proton temperature (deg., K), the maximum proton temperature (deg., K), and the alpha/proton fraction (alpha fraction = 0.00 means no determination made). We have not attempted to cross-calibrate our density values with those from other experiments. However, we suspect that our densities tend to be too low in the later years because of detector degradation. We suggest that cross-calibration using, for example, the IMP values would be a useful exercise for the NSSDC before these data are made available to the general public. Please note also that many of these measurements were obtained within the foreshock region where the solar wind flow is affected by the waves present there. I am enclosing a sample listing of the data with the read format indicated. Please contact me (Ph: 505-667-5389; SPAN: ESSDP1::073500) if you have any questions concerning this submission. Sincerely, J. T. Gosling JTG/st Enc. a/s Cy: K. Ogilvie, GSFC/692 R. Wales, GSFC/602 CRM-4 (2) ------------------------------ Documentation for ISEE-1 Cross Fan Ion data files submitted to NSSDC FILE ORGANIZATION: Sequential RECORD FORMAT: Variable length, maximum 85 bytes RECORD ATTRIBUTES: Carriage return, carriage control C C DEFINITION: 10 ISEE-1 CROSS-FAN ION MOMENTS C ELEMENTS: C 1 IYYMMDD C 2 SECONDS C 3 UTIME HHMMSS C 4 DENSITY COMBINED INTEGRATION (cm**-3) C 5 FLOW SPEED COMBINED INTEGRATION (km/sec) C 6 FLOW ANGLE COMBINED INTEGRATION (deg) C 7 FLOW LATITUDE COMBINED INTEGRATION (deg) C 8 TPER (MIN) COMBINED INTEGRATION (K) C 9 TPAR (MAX) COMBINED INTEGRATION (K) C 10 ALPHA FRACTION COMBINED MODEL FORMAT: 1000 FORMAT (1X,I6,1X,2(F8.1,1X),5(1PE11.4,1X),15(/,6(1PE11.4,1X))) READ: READ (1,1000)IYYMMDD,SEC,UTIME,(PLASMA(I),I=4,10) SAMPLE: 771030 14157.0 35557.0 5.8983E+00 4.4001E+02 -2.3133E+00 1.5247E-01 1.0174E+05 3.6686E+05 7.1104E-02 771030 14206.0 35646.0 6.7653E+00 3.5366E+02 -2.6616E+00 -9.1330E+00 2.7225E+05 5.4985E+05 0.0000E+00 771030 14254.0 35734.0 1.0128E+00 3.9360E+02 1.6266E+01 6.1878E-01 2.0082E+05 5.1891E+05 0.0000E+00 771030 14303.0 35823.0 7.5370E+00 3.8160E+02 4.7102E+00 1.0105E-01 1.4862E+05 3.0551E+05 4.0966E+00 771030 14352.0 35912.0 8.2415E+00 4.3298E+02 1.7180E+00 -1.9851E+00 9.9189E+04 2.0530E+05 4.4581E+00 771030 14400.0 40000.0 1.4547E+00 4.2747E+02 -2.0509E+00 -1.2732E+00 1.1490E+05 1.6301E+05 0.0000E+00 771030 14449.0 40049.0 5.5504E+00 4.1908E+02 1.0272E+01 1.0591E+00 8.5184E+04 5.1876E+05 0.0000E+00 --------------------------------------------------------------------------- ISEE 1 77-102A-01N (Solar Wind Ion mom X-Fan xxxx 24-sec) 1 Tape Tape Label = ICSWX Blocksize = 32767 Density = 6250 # Tape # VAX File Name Blocks Blocks # Times Time Span --------- ------ ------ ------- ------------------------------------ 77ISEE1.4 189 11827 106232 771030 03:55:57 to 780108 12:34:15 78ISEE1.4 406 25431 228424 780602 14:30:37 to 790101 22:07:50 79ISEE1.4 453 28438 255436 790706 19:51:15 to 801231 19:59:02 80ISEE1.4 505 31689 284642 800624 05:14:40 to 810111 15:14:12 81ISEE1.4 436 27356 245720 810702 04:45:01 to 820117 14:12:26 82ISEE1.4 418 26243 235724 820703 02:32:38 to 830211 10:00:11 83ISEE1.4 400 25112 225566 830609 17:34:37 to 840130 23:59:44 ------------------------------------------------------------------------------- From: ESSDP2::073500 "Jack Gosling: 27-OCT-1990 12:20:12.02 To: 7010::SUMANT CC: 073500 Subj: ISEE 1 AND 2 DATA Sumant: In response to your recent message, I have the following comments. 0. The FPEs on ISEE 1 and 2 were not operating in 1982 and 1983. We did send you the ISEE 3 geotail data for that time period. 1. Yes, the ISEE 1 x-fan experiment made only ion measurements. 2. No, we have not processed the x-fan data for anything other than the solar wind periods. The data are not useful elsewhere along the orbit. 3. I do not believe the instrument was turned off after 1983, but by 1984 the detector gain had deteriorated to the poing where the data were no longer useful, and we did not process it beyond that point. 4. The ISEE 2 FPE failed in April 1980 and there are no useful data beyond that point. Regards, Jack Gosling ------------------------------------------------------------------------------- From: NCF::KING 28-AUG-1992 09:55:55.53 To: SUMANT CC: Subj: ISEE-1 plasma data Sumant, this is the message to which the message I just forwarded you was a response. From: ESSDP1::073500 "Jack Gosling" 27-AUG-1992 17:24:19.80 To: NCF::KING CC: 073500 Subj: ISEE 1 SOLAR WIND DATA Joe: Our ISEE 1 solar wind experiment had a gain problem that progressively got worse with time. After 1983 the data were so suspect that we discontinued processing it. Thus, you already have what I consider to be the usable ISEE 1 solar wind data, and there are likely to be density problems with the data you do have. Regards, Jack