HDF4 file: 16 data descriptors
library version = "HDF Version 4.2 Release 13, June 24, 2017"
data description = (text block)
| The file 'uleis_level2_data_1hr.h' is shown below, it was used to create the data in the Vgroup named 'VG_ULEIS_data_1hr'.
| 
| /* Id: uleis_level2_data_1hr.h,v 1.3 2008/09/11 22:41:48 asc Exp $ */
| 
| #include "hdfi.h"
| 
| struct ULEIS_data_1hr {
| 
|   /* UT time at the start of the periods */
|   int32   year;                         /* integer year */
|   int32   day;                          /* integer day of year */
|   int32   hr;                           /* hour of day */
|   int32   min;                          /* min of hour */
|   float32 sec;                          /* seconds */
|   float64 fp_year;                      /* floating point year */
|   float64 fp_doy;                       /* floating point Day of YearDOY */
|   float64 ACEepoch;                     /* UT time in sec since 1/1/96 */
| 
|   float32 H_S1;
|   float32 H_S2;
|   float32 H_S3;
|   float32 H_S4;
|   float32 H_S5;
| 
|   float32 unc_H_S1;
|   float32 unc_H_S2;
|   float32 unc_H_S3;
|   float32 unc_H_S4;
|   float32 unc_H_S5;
| 
|   float32 He3_S1;
|   float32 He3_S2;
|   float32 He3_L2;
|   float32 He3_L3;
|   float32 He3_L4;
|   float32 He3_L5;
|   float32 He3_L6;
| 
|   float32 unc_He3_S1;
|   float32 unc_He3_S2;
|   float32 unc_He3_L2;
|   float32 unc_He3_L3;
|   float32 unc_He3_L4;
|   float32 unc_He3_L5;
|   float32 unc_He3_L6;
| 
|   float32 He4_S1;
|   float32 He4_S2;
|   float32 He4_S3;
|   float32 He4_L1;
|   float32 He4_L2;
|   float32 He4_L3;
|   float32 He4_L4;
|   float32 He4_L5;
|   float32 He4_L6;
|   float32 He4_L7;
|   float32 He4_L8;
|   float32 He4_L9;
|   float32 He4_L10;
|   float32 He4_L11;
|   float32 He4_L12;
| 
|   float32 unc_He4_S1;
|   float32 unc_He4_S2;
|   float32 unc_He4_S3;
|   float32 unc_He4_L1;
|   float32 unc_He4_L2;
|   float32 unc_He4_L3;
|   float32 unc_He4_L4;
|   float32 unc_He4_L5;
|   float32 unc_He4_L6;
|   float32 unc_He4_L7;
|   float32 unc_He4_L8;
|   float32 unc_He4_L9;
|   float32 unc_He4_L10;
|   float32 unc_He4_L11;
|   float32 unc_He4_L12;
| 
|   float32 C_S1;
|   float32 C_L1;
|   float32 C_L2;
|   float32 C_L3;
|   float32 C_L4;
|   float32 C_L5;
|   float32 C_L6;
|   float32 C_L7;
|   float32 C_L8;
| 
|   float32 unc_C_S1;
|   float32 unc_C_L1;
|   float32 unc_C_L2;
|   float32 unc_C_L3;
|   float32 unc_C_L4;
|   float32 unc_C_L5;
|   float32 unc_C_L6;
|   float32 unc_C_L7;
|   float32 unc_C_L8;
| 
|   float32 O_S1;
|   float32 O_L1;
|   float32 O_L2;
|   float32 O_L3;
|   float32 O_L4;
|   float32 O_L5;
|   float32 O_L6;
|   float32 O_L7;
| 
|   float32 unc_O_S1;
|   float32 unc_O_L1;
|   float32 unc_O_L2;
|   float32 unc_O_L3;
|   float32 unc_O_L4;
|   float32 unc_O_L5;
|   float32 unc_O_L6;
|   float32 unc_O_L7;
| 
|   float32 Ne_S_L1;
|   float32 Ne_S_L2;
|   float32 Ne_S_L3;
|   float32 Ne_S_L4;
|   float32 Ne_S_L5;
|   float32 Ne_S_L6;
|   float32 Ne_S_L7;
| 
|   float32 unc_Ne_S_L1;
|   float32 unc_Ne_S_L2;
|   float32 unc_Ne_S_L3;
|   float32 unc_Ne_S_L4;
|   float32 unc_Ne_S_L5;
|   float32 unc_Ne_S_L6;
|   float32 unc_Ne_S_L7;
| 
|   float32 Fe_L1;
|   float32 Fe_L2;
|   float32 Fe_L3;
|   float32 Fe_L4;
|   float32 Fe_L5;
|   float32 Fe_L6;
|   float32 Fe_L7;
|   float32 Fe_L8;
|   float32 Fe_L9;
| 
|   float32 unc_Fe_L1;
|   float32 unc_Fe_L2;
|   float32 unc_Fe_L3;
|   float32 unc_Fe_L4;
|   float32 unc_Fe_L5;
|   float32 unc_Fe_L6;
|   float32 unc_Fe_L7;
|   float32 unc_Fe_L8;
|   float32 unc_Fe_L9;
| };
file description = (text block)
| Created by the ACE Science Center (ASC)
| ACE Science Center Level 2 Software Version:  1.5
| ACE Science Center Processing Date/Time: Tue Aug 18 10:35:49 2026 PST
| ULEIS Team Processing Date/Time: 20260818 10:22:51
| 
| For more info email us at: asc@srl.caltech.edu
| 
| 
| All timestamps are UT, and refer to the start of the time period.
| year,day,hr,min,sec: year, day of year, hour of day, minutes, seconds.
| fp_year       : fractional year.
| fp_doy        : fractional day-of-year.
| ACEepoch      : seconds since Jan 1 00:00:00 UT 1996.
| 
| H_S1 to H_S5      :   H flux, 0.16-0.32, 0.32-0.64, 0.64-1.28, 1.28-2.56, 2.56-7.24 MeV/nuc.
| He3_S1, He3_S2    : He3 flux, 0.072-0.16, 0.16-0.32 MeV/nuc.
| He3_L2 to He3_L6  : He3 flux, 0.32-0.64, 0.64-1.28, 1.28-3.62, 3.62-7.24, 7.24-10.20 MeV/nuc.
| He4_S1 to He4_S3  : He4 flux, 0.063-0.08, 0.08-0.113, 0.113-0.16 MeV/nuc.
| He4_L1 to He4_L6  : He4 flux, 0.175-0.226, 0.226-0.32, 0.32-0.453, 0.453-0.64, 0.64-0.905, 0.905-1.28 MeV/nuc.
| He4_L7 to He4_L12 : He4 flux, 1.28-1.81, 1.81-2.56, 2.56-3.62, 3.62-5.12, 5.12-7.24, 7.24-8.67 MeV/nuc.
| C_S1,C_L1 to C_L4 :   C flux, 0.041-0.111, 0.111-0.16, 0.16-0.32, 0.32-0.64, 0.64-1.28  MeV/nuc.
| C_L5 to C_L8      :   C flux, 1.28-2.56, 2.56-5.12, 5.12-10.2, 10.20-14.0 MeV/nuc.
| O_S1,O_L1 to O_L3 :   O flux, 0.04-0.09, 0.09-0.16, 0.16-0.32, 0.32-0.64 MeV/nuc.
| O_L4 to O_L7      :   O flux, 0.64-1.28, 1.28-2.56, 2.56-5.12, 5.12-10.4 MeV/nuc.
| Ne_S_L1 to Ne_S_L4:Ne_S flux, 0.061-0.08, 0.08-0.16, 0.16-0.32, 0.32-0.64 MeV/nuc.
| Ne_S_L5 to Ne_S_L7:Ne_S flux, 0.64-1.28, 1.28-2.56, 2.56-7.04 MeV/nuc.
| Fe_L1 to Fe_L5    :  Fe flux, 0.035-0.04, 0.04-0.08, 0.08-0.16, 0.16-0.32, 0.32-0.64 MeV/nuc.
| Fe_L6 to Fe_L9    :  Fe flux, 0.64-0.905, 0.905-1.28, 1.28-1.81, 1.81-3.07 MeV/nuc.
| unc_XX            :Fractional uncertainty (statistical) in flux XX.
| 
| A value of -999.9 indicates bad or missing data.
| 
| 
| All fluxes are in units of particles/(cm^2 s sr MeV/nucleon)
| All uncertainties are statistical only, and are given as
| fractional uncertainties.
| 
| 
| Species	Channel	Emin - Emax
| 
| H 	S 1 	0.160 - 0.320
| H 	S 1 	0.160 - 0.320
| H 	S 2 	0.320 - 0.640
| H 	S 3 	0.640 - 1.280
| H 	S 4 	1.280 - 2.560
| H 	S 5 	2.560 - 7.240
| 3He 	S 1 	0.072 - 0.160
| 3He 	S 2 	0.160 - 0.320
| 3He 	S 3 	0.320 - 0.640
| 3He 	S 4 	0.640 - 1.280
| 3He 	S 5 	1.280 - 2.860
| 3He 	L 1 	0.255 - 0.320
| 3He 	L 2 	0.320 - 0.640
| 3He 	L 3 	0.640 - 1.280
| 3He 	L 4 	1.280 - 3.620
| 3He 	L 5 	3.620 - 7.240
| 3He 	L 6 	7.240 - 10.20
| 4He 	S 1 	0.063 - 0.080
| 4He 	S 2 	0.080 - 0.113
| 4He 	S 3 	0.113 - 0.160
| 4He 	S 4 	0.160 - 2.180
| 4He 	L 1 	0.175 - 0.226
| 4He 	L 2 	0.226 - 0.320
| 4He 	L 3 	0.320 - 0.453
| 4He 	L 4 	0.453 - 0.640
| 4He 	L 5 	0.640 - 0.905
| 4He 	L 6 	0.905 - 1.280
| 4He 	L 7 	1.280 - 1.810
| 4He 	L 8 	1.810 - 2.560
| 4He 	L 9 	2.560 - 3.620
| 4He 	L 10 	3.620 - 5.120
| 4He 	L 11 	5.120 - 7.240
| 4He 	L 12 	7.240 - 8.670
| C 	S 1 	0.041 - 0.111
| C 	S 2 	0.111 - 0.803
| C 	L 1 	0.111 - 0.160
| C 	L 2 	0.160 - 0.320
| C 	L 3 	0.320 - 0.640
| C 	L 4 	0.640 - 1.280
| C 	L 5 	1.280 - 2.560
| C 	L 6 	2.560 - 5.120
| C 	L 7 	5.120 - 10.20
| C 	L 8 	10.20 - 14.00
| O 	S 1 	0.040 - 0.090
| O 	S 2 	0.090 - 0.645
| O 	L 1 	0.090 - 0.160
| O 	L 2 [a] 0.160 - 0.320
| O 	L 3 [a] 0.320 - 0.640
| O 	L 4 	0.640 - 1.280
| O 	L 5 	1.280 - 2.560
| O 	L 6 	2.560 - 5.120
| O 	L 7 	5.120 - 10.40
| Ne-S 	S 1 	0.032 - 0.080
| Ne-S 	S 2 	0.080 - 0.460
| Ne-S 	L 1 	0.061 - 0.080
| Ne-S 	L 2 	0.080 - 0.160
| Ne-S 	L 3 	0.160 - 0.320
| Ne-S 	L 4 	0.320 - 0.640
| Ne-S 	L 5 	0.640 - 1.280
| Ne-S 	L 6 	1.280 - 2.560
| Ne-S 	L 7 	2.560 - 7.040
| Fe 	S 1 	0.023 - 0.040
| Fe 	S 2 	0.040 - 0.232
| Fe 	L 1 	0.035 - 0.040
| Fe 	L 2 	0.040 - 0.080
| Fe 	L 3 	0.080 - 0.160
| Fe 	L 4 	0.160 - 0.320
| Fe 	L 5 	0.320 - 0.640
| Fe 	L 6 	0.640 - 0.905
| Fe 	L 7 	0.905 - 1.280
| Fe 	L 8 	1.280 - 1.810
| Fe 	L 9 	1.810 - 3.070
| 
| [a] Prior to Feb 18, 1998 (DOY 049), these two channels were merged as a single channel.
file description = (text block)
| ULEIS Instrument team contact:
| 		Glenn Mason
| 	Phone:	240-228-2805
| 	Org:	John Hopkins University Applied Physics Laboratory
| 	Email:	Glenn.Mason@jhuapl.edu
| 
| 	ULEIS Principal Investigator:
| 		Glenn Mason
| 	Phone:	240-228-2805
| 	Org:	JHU/Applied Physics Lab
| 	Email:	Glenn.Mason@jhuapl.edu
file description = (text block)
| ACE/ULEIS Release Notes:
| 
|       The following are cumulative release notes for the ACE Ultra
|       Low Energy Isotope Spectrometer (ULEIS) Level-2 datasets.  As
|       new datasets are released or old datasets are processed, this
|       file will be extended.   The assessment of data quality, such
|       as for  instrument  saturations,  represents the best current
|       knowledge and may be retroactively updated in future releases.
| 
| =============================================================================
| 
| Time periods of significance to the Level-2 data are as follows:
| 
| 1) periods of instrument saturation:
| 
| 1998	120.25	to 	1998	122.25
| 1998	124.00	to 	1998	125.00
| 1998	126.25	to 	1998	126.50
| 1998	238.25	to 	1998	239.00
| 1998	267.75	to 	1998	269.25
| 1999	22.75	to 	1999	24.50
| 1999	49.00	to 	1999	49.25
| 1999	125.50	to 	1999	128.00
| 1999	177.00	to 	1999	178.75
| 1999	265.25	to 	1999	265.75
| 2000	42.75	to 	2000	43.50
| 2000	97.50	to 	2000	98.00
| 2000	160.25	to 	2000	160.75
| 2000	175.50	to 	2000	176.00
| 2000	195.25	to 	2000	198.00
| 2000	261.50	to 	2000	262.00
| 2000	313.75	to 	2000	315.50
| 2001	86.50	to 	2001	87.00
| 2001	90.00	to 	2001	90.50
| 2001	101.25	to 	2001	101.75
| 2001	118.00	to 	2001	118.75
| 2001	268.75	to 	2001	270.50
| 2001	294.50	to 	2001	295.00
| 
| 
| 2) other events:
| 
|   1998-161 16:50 - 1998-167 16:35  No data due to possible C&DH reset problem.
|   1998-226 18:12 - 1998-226 19:21  No data due instrument commanding.
|   1998-227 14:18 - 1998-227 16:55  No data due instrument commanding.
|   1998-227 16:55                   Switch to TOF-2 triggering
|   1998-317 15:00 - 1998-324 19:10  No data due to Leonid shower protection.
|   2000-047 13:15 - 2000-049 09:45  No data due to instrument commanding.
|   2000-108 16:00 - 2000-109 17:00  Instrument calibration mode; no science data
|   2000-116 15:00 - 2000-118 00:00  Instrument commanding.
|   2001-282 17:25 - 2001-283 22:10  Instrument commanding.
|   2001-299 16:20                   Automatic aperture door operation commenced
|                                    (see entry below for October 26, 2001).
|   2003-301 10:20 - 2003-302 13:00  Approximate period in which the instrument
|                                    had significant dead time due to high count
|                                    rates.  During this time, the dead time
|                                    varied, with a maximum value of about 83%
|                                    during the most intense portions of the event.
|   2017-297 05:58                   Instrument inadvertently turned off.
|   2017-315 00:00                   Instrument returned to pre-shutdown operating state
| 
| 
| =============================================================================
| Aug. 14, 1998:
| 
| Switch telescope basic triggering from Start-1/Stop (= TOF1) to Start-2/Stop (= TOF2)
| in order to decrease the frequency of periods when the instrument is saturated.  Since
| Start-2 MCP stack has lower count rate than Start-1 it is less susceptible
| to saturation due to high count rates.
| 
| =============================================================================
| Apr. 3, 2000:
| 
| Gain of Start-1 MCP stack decreases to near zero at 09:52;  after this time no
| useful TOF1 data.
| 
| =============================================================================
| October 26, 2001:
| 
| Automatic door operation commenced on Oct 26 (DOY 299), 2001, and greatly
| reduces the incidence of saturation and loss of MCP gain during intense events.
| When the door moves to change the size of the entrance aperture of the
| instrument, the door location is telemetered in the instrument housekeeping
| data.  Existing software automatically adjusts the instrument geometry factor
| for such periods, and so the ULEIS Level 2 fluxes at the ASC need no correction
| for door motion.
| 
| =============================================================================
| August 21, 2008:
| 
| release of new version of uleis intensities, generated with udf_lister
| program including all efficiency updates.  List of instrument saturations
| updated;  several additional periods added.
| 
| =============================================================================
| Nov. 6, 2009:
| 
| release of modified uleis intensities for Bartels rotations 2373-2404 to correct
| for a decrease in efficiency for H and He.  Other species are not affected.
| 
| =============================================================================
| April 20, 2012:
| 
| release of new version of uleis multipanel browse intensity 4-day plots with added indicator
| color bar near top of lower panel that shows approximate door position:
| 	100% open:	no indication
| 	25% open:		blue line
| 	6% open:		orange line
| 	1% open:		red line
| 	0% open:		black line
| 
| =============================================================================
| Sept. 3, 2014:
| 
| release of new version of uleis multipanel browse intensity 4-day plots with added indicator
| on top panel where saturation periods in above list are marked in yellow.  List of instrument
| saturation periods updated.
| 
| =============================================================================
| Aug 17, 2022:
| 
| comparison between intensities measured by uleis and the Solar Orbiter Suprathermal Ion Spectrograph during
| the Solar Orbiter near-Earth flyby in November 2021 show that the uleis He (3 and 4) intensities are
| too high.  The He (3 and 4) efficiency was increased to lower the He fluxes by a factor of 2.3.  Other species
| are not affected.  Data and plots containing He intensities were reprocessed with the new efficiencies
| beginning with uleis observations beginning Jan-1-2020 0:0 to overlap with the start of the Solar Orbiter
| mission.
| 
| A processing error where during some periods time dependence of the H and He intensities was not implemented
| has been corrected.  Intensity (HDF) 1 hr, 24 hr, and 27 day averages files, and anisotropy and stack energy plots
| for H and He were reprocessed.  Since the affected time periods were spread through the mission in an
| irregular way, it was decided to reprocess all time periods even though some were not affected.
| 
| -------------------------------------------------------------------------------
data description = (text block)
| The file 'level2_record_doy.h' is shown below, it was used to create the data in the Vgroup named 'VG_level2_record_doy'.
| 
| /* Id: level2_record_doy.h,v 1.1 2000/08/02 00:47:11 asc Exp $ */
| 
| #include "hdfi.h"
| 
| /* record year/DOY association */
| struct level2_record_doy {
| 
|   int32   record_number;             /* record number */
|   int32   year;                      /* integer year */
|   int32   day;                       /* integer day of year */
|   int32   days_jan_1_1996;           /* days since January 1, 1996 UT 0 hr*/
| 
| };
vgroup "VG_ULEIS_data_1hr" class "VG_ULEIS_LEVEL2_DATA_1HR"
	vdata "ULEIS_data_1hr" class "ACE uleis data level2 1-day averages": fields year, day, hr, min, sec, fp_year, fp_doy, ACEepoch, H_S1, H_S2, H_S3, H_S4, H_S5, unc_H_S1, unc_H_S2, unc_H_S3, unc_H_S4, unc_H_S5, He3_S1, He3_S2, He3_L2, He3_L3, He3_L4, He3_L5, He3_L6, unc_He3_S1, unc_He3_S2, unc_He3_L2, unc_He3_L3, unc_He3_L4, unc_He3_L5, unc_He3_L6, He4_S1, He4_S2, He4_S3, He4_L1, He4_L2, He4_L3, He4_L4, He4_L5, He4_L6, He4_L7, He4_L8, He4_L9, He4_L10, He4_L11, He4_L12, unc_He4_S1, unc_He4_S2, unc_He4_S3, unc_He4_L1, unc_He4_L2, unc_He4_L3, unc_He4_L4, unc_He4_L5, unc_He4_L6, unc_He4_L7, unc_He4_L8, unc_He4_L9, unc_He4_L10, unc_He4_L11, unc_He4_L12, C_S1, C_L1, C_L2, C_L3, C_L4, C_L5, C_L6, C_L7, C_L8, unc_C_S1, unc_C_L1, unc_C_L2, unc_C_L3, unc_C_L4, unc_C_L5, unc_C_L6, unc_C_L7, unc_C_L8, O_S1, O_L1, O_L2, O_L3, O_L4, O_L5, O_L6, O_L7, unc_O_S1, unc_O_L1, unc_O_L2, unc_O_L3, unc_O_L4, unc_O_L5, unc_O_L6, unc_O_L7, Ne_S_L1, Ne_S_L2, Ne_S_L3, Ne_S_L4, Ne_S_L5, Ne_S_L6, Ne_S_L7, unc_Ne_S_L1, unc_Ne_S_L2, unc_Ne_S_L3, unc_Ne_S_L4, unc_Ne_S_L5, unc_Ne_S_L6, unc_Ne_S_L7, Fe_L1, Fe_L2, Fe_L3, Fe_L4, Fe_L5, Fe_L6, Fe_L7, Fe_L8, Fe_L9, unc_Fe_L1, unc_Fe_L2, unc_Fe_L3, unc_Fe_L4, unc_Fe_L5, unc_Fe_L6, unc_Fe_L7, unc_Fe_L8, unc_Fe_L9; 648 records
vgroup "VG_level2_record_doy" class "VG_LEVEL2_RECORD_DOY"
	vdata "level2_record_doy" class "level2_record DOY table": fields record_number, year, day, days_jan_1_1996; 27 records