Document title: Text_describing_the_analysis_software.txt for the NDADS DE
EICS datatype 
Project: DE 
NDADS Datatype: EICS        
Super-EID: DOCUMENT                      
There may be other documents also identified by this super-EID.
NDADS filename: EICS_TEXT_DESCRIBING_ANALYSIS_SOFTWARE.TXT
TRF entry B46583.txt in NSSDC's controlled digital document library, Feb. 1998.
Document text follows:
----------------------


	TEXT_DESCRIBING_THE_ANALYSIS_SOFTWARE.TXT
		W.K. Peterson
		July, 1989

                modified by S.A. Boardsen July,1993


	Documentation on the general purpose EICS analysis 
program to be provided to read the SATF and return geophysical 
parameters.  

    In order to get EICS software see DE HOLDINGS file. Information
on how to compile and link the software is locate in file
EICS_NOTES.TEX.

    The program EICS.EXE returns velocity space densities, fluxes, or
count rates for the various ion species sampled, running under the VMS
operating system. 


    If EICS.EXE does not execute, contact NSSDC for the EICS software
source code and linking instructions.  However NSSDC does not
guarantee to maintain the software against changes in operating
environments. 

    The output of the EICS.EXE program is explained by the file       
ANNOTATED_OUTPUT_LISTING.TXT. 


                 SCENARIO FOR PROCESSING EICS DATA

  It is assumed that the user has requested and obtained the SATF data
files the user wants to analyze.

The data files used in the examples below are   
        EICS_84004A_1416_1616_T76.DAT			      
        EICS_84006B_0600_0620_T146.DAT

  An example of the inputs to this program to produce a listing
of the velocity_space densities and standard deviations in 8 equally
spaced pitch angle ranges for all ion species sampled between 0605 and
0610 on January 6, 1984 is shown below.



+-----------------------------------------------------------------------------
-+
|                                                                              
|
| 1. Filename EICS_84006B_0600_0620_T146.DAT
|
|                                        9. 8 angular bins                     
|
| 2. Start: 84006:06:05:00 = 21900                                             
|
|                                       10. Select normal pitch angle          
|
| 3. Stop:  84006:06:10:00 = 22400                                             
|
|                                       11. Don't use filter                   
|
| 4. Single time interval                                                      
|
|                                       12. Use first M/Q values found         
|
| 5. no specific mode selected                                                 
|
|                                                                              
|
|                                                                              
|
| 6. Use MD2                            13. Don't write any plot information   
|
|									       |
|                                                                              
|
| 7. No ED specified                    14. Print now                          
|
|                                                                              
|
| 8. Accumulate 15 STD ESA and          15. Final output: Velocity Space       
|
|               16 STD RPA channels                        (no ED)              
|
+-----------------------------------------------------------------------------
-+
Enter -1 or <CTRLZ> to quit EICS.
Enter menu # to change or 0 to accumulate with the above parameters: 

     The plot file referred to in item 13 above is an ASCII file that is
readable by code created at Lockheed using Version 5.0 of high level
graphics language DI-3000 to create line plots.  While the basic fortran
calls to DI-3000 routines have remained constant, successive versions
have required development of new procedures to 'LINK' EICS fortran and
pascal code with DI-3000 code.  We will therefore not transfer graphics
code to the NSSDC because of the indeterminate labor costs associated
with establishing and supporting interfaces to high level graphics
languages in unknown and changing environments.   Below the various 
options in the above menu are explained and an annotated  listing of the
output is given.

	Narrative description of options (questions) associated with the 
EICS.EXE program.

>>To run the code from the optical device use the commands

	$run EICS.EXE
	Interactive? (Y/N):
>>answer y and you get the following
	y
	Error   29 on opening the file in subroutine opencfile.
>> The screen is cleared and the following display appears.

+-----------------------------------------------------------------------------
-+
|                                                                              
|
| 1. Filename Your_current_default_disk_and_directory:EICSDATA.DAT	       
|
|                                        9. 8 angular bins                     
|
| 2. Start: 00000:00:00:00 = 00000                                             
|
|                                       10. Select normal pitch angle          
|
| 3. Stop:  00000:00:00:00 = 00000                                             
|
|                                       11. Don't use filter                   
|
| 4. Single time interval                                                      
|
|                                       12. Use first M/Q values found         
|
| 5. no specific mode selected                                                 
|
|                                                                              
|
|                                                                              
|
| 6. Use MD2                            13. Don't write any plot information   
|
|                                                                              
|
| 7. No ED specified                    14. Print now                          
|
|                                                                              
|
| 8. Accumulate 15 STD ESA and          15. Final output: Flux		       
|
|               16 STD RPA channels                       (no ED)              
|
+-----------------------------------------------------------------------------
-+
Enter -1 or <CTRLZ> to quit EICS.
Enter menu # to change or 0 to accumulate with the above parameters: 

>>You now must enter a VALID FILE NAME:  ENTER 1 followed by a CR
>>which returns the prompt in the bottom scrolling area of screen:

		Enter file name: 
>>If you enter an invalid file name (such as file_not_there.dat) 
>>you get the error:

Error   29 on opening the file in subroutine opencfile.
Error - file file_not_there.dat not found

>>	when a valid file name such as EICS_84004A_1416_1616_T76.DAT 
>>is entered the file and its start time and stop times are entered on 
>>the full page display as illustrated below.
+-----------------------------------------------------------------------------
-+
|                                                                              
|
| 1. Filename EICS_84004A_1416_1616_T76.DAT				       |
|                                        9. 8 angular bins                     
|
| 2. Start: 84004:14:16:12.996 = 51373					       |
|                                       10. Select normal pitch angle          
|
| 3. Stop:  84004:16:15:49.102 = 58549 					       |
| etc                                                                          
|
|                                                                              
|
+-----------------------------------------------------------------------------
-|
Enter -1 or <CTRLZ> to quit EICS.
Enter menu # to change or 0 to accumulate with the above parameters: 


>>At this point you can enter a 0 and data for the time range 84004:14:16:12.996
>>to 84004:16:15:49.102 on day 4 (January 4) of 1984 will be accumulated and written 
>>to file FOR108.DAT in your current working directory.  The structure of 
>>the output file is discussed below.
>>  If the you want to accumulate data for a shorter interval, use fewer
>>angular bins, etc. you can select menu #s 2 to 15. 
>>
>>
>>OPTIONS 2 and 3 change the time interval and provide for a series of regular
>>accumulation intervals.  The basic prompt is:

		Enter starting date or -1 to quit [84004]: 
>>-1 will cause the program to terminate.
>>a return will set the date to the value in brackets 84004 in this case.
>>You are next prompted:

	Enter time in seconds, hh:mm:ss, hh:mm or "MS=" <value>: 

>>valid responses to this are for example:
>>		15:10:00
>>		15:10
>>		15:
>>		48123
>>		MS=49143123
>>which will start (or end) the accumulation at the following times given in 
>>seconds of the day  54600, 54600, 54000, 48123, and 49143.123
>>Note that the program starts or stops the accumulation at intervals of 1/16 
>>of the basic 8 second telemetry block or 0.5 seconds.
>>
>>OPTION 4 determines if a single of multiple accumulations are to be 
>>made.  Selecting Menu item # 4 returns the prompt:

Measure time in [S]pins per interval, instrument [C]ycles, or use a single 
[T]ime interval? (SCT) [T]: 

>> Selecting S gives the following prompt:

	Enter # of spins/interval: 
>> Selecting C gives the prompt:
	Enter # of cycles/interval: 

>>
>> Each spin period is six (6) seconds.  EICS modes have cycle times of 
>> 4, 16, 20, and 32 spin periods.  You can select any number greater 
>>than 1 and less than or equal to 999.   The program will accumulate 
>>data for the specified number of EICS mode cycles or satellite spin
>>periods, provide the output specified by options 13,14, and 15 for
>>successive intervals starting and stoping at the times specified by
>>options 2 and 3.
>>
>>OPTION 5 is used to select specific EICS mode types.  For normal data 
>>processing the default <no specific mode selected> is appropriate.
>>Selecting option 5 returns the following output:

Mode type codes:
-1: no specific mode selected          0: all modes
 1: run mode         2: run drum modes 3: LOSC mode       4: LODM mode
Enter mode type [-1]: 

>>
>>OPTION 6 selects one of two detector threshold settings.  For normal 
>>data processing the default <Use MD2> is appropriate.  Selecting 
>>option 6 returns:

Enter 1 or 2 for MD1 or MD2 [2]: 

>>
>>OPTION 7 selects one of the two non-mass resolving 'energy detectors',
>>only one of which is operated in each EICS mode.  For normal data
>>processing the default <No ED specified> is appropriate.  Selecting 
>>option 7 gives the following prompt.

Enter 1 for ED1, 2 for ED2, 0 or <RETURN> for unspecified ED: 

>>
>>Option 8 selects one of three possible sets of energy bins.  In 
>>some non-standard modes the EICS instrument returns data from 64
>>discrete energy ranges.  For normal data the default <15 STD ESA ..etc>
>>is appropriate.  Selecting Selecting option 8 returns the following 
>>prompt.

Accumulation codes:
            E: 32 ESA energy channels     R: 32 RPA energy channels
                     S: 15 STD ESA and 16 STD RPA channels
Enter accumulation code [S]:  

>>
>>Note selecting options E or R will change the format of the output 
>>listing (Option 14).  
>>
>>
>>OPTION 9 selects one of 64 possible angular resolutions.  The default 
>>is to 'bin' the data into eight (8) angular bins.  Because EICS
>>counting rates are at times low it is sometimes useful to select
>>less than 8 angular bins.  Selecting option 9 gives the following 
>>prompt:

Enter number of angular bins (1-64) [8]: 

>>The response to this prompt is self evident.  All of the angular bins
>>are uniformly spaced.
>>
>>Option 10 is used to select the 'type' of angular sorting to be done.
>>The default <Select normal pitch angle> sorts the data into the number 
>>of angular bins specified by option 9 using the 'normal' pitch angle.
>>Normal pitch angle is the angle between the particle motion and the 
>>magnetic field direction.  Thus ions flowing up magnetic field lines 
>>from the north (south) polar ionosphere have a normal pitch angle of 
>>180 (zero) degrees.  For normal processing the 'normal' pitch angle
>>should be used.  
>>  Selecting Option 10 returns the prompt:

Angle codes:
0: Normal (180 degree) pitch angle   1: Spin phase (ram) angle
2: Spin   (360 degree) pitch angle
Enter angle code [0]: 

>>For some applications it is necessary to sort ion fluxes with respect 
>>to the satellite 'ram' direction or to retain gyro-phase pitch angle
>>information.  
>>
>>Selecting sub-option 1: <Spin phase (ram) angle> will cause 
>>the data to be accumulated in the specified (by option 9) number of 
>>angular bins with respect to the the spacecraft velocity direction.
>>Zero (0) degrees in this coordinate system is when the EICS instrument
>>is looking into to the satellite velocity direction. Note that the EICS 
>>and RIMS instruments look radially outward in different directions and 
>>so view the 'ram' direction at different times in each satellite spin 
>>period.  WARNING: A large fraction of the EICS stand alone Telemetry 
>>files do not include spacecraft attitude information.  These files are 
>>clearly marked in the EICS SATF INDEX (CATALOG) by the symbol 'A'.
>>Selecting sub-option 1 for these files will produce erroneous data.
>>
>>Selecting sub-option 2: Spin (360 degree) pitch angle will cause the 
>>the data to be accumulated with respect to a 360 degree pitch angle,
>>thus preserving gyro-phase information.  Note spacecraft attitude 
>>information is not used to calculate the 360 degree pitch angle
>>so this option is valid for all EICS data files.
>>
>>
>>Option 11 is used to apply a filter to the telemetry before it is
>>is accumulated.  The filter is used as a diagnostic tool only.  It is
>>not appropriate for normal data processing.  Only the default option
>> <Don't use filter> should be used for data processing.
>>
>>
>>OPTION 12 is used to select up to four mass settings.  The largest
>>fraction of the EICS data is in modes where only two or four of 64 
>>possible mass steps are sampled.  The mass steps selected are at the 
>>peak response positions for the most common ions such as H+, He+,
>>He++,and O+ corresponding to M/Q = 1,2,4 and 16.  Less frequently 
>>sampled mass steps sampled are O+6, and O++ (M/Q=2.6 and 8).   The 
>>default is to use the first four mass steps encountered.  For all
>>files NOT flagged by the letter 'N' in the EICS SATF INDEX (CATALOG) 
>>the default is usually best choice.  
>>
>>If you want to select ONLY a specific mass setting then respond to 
>>the option:

	Use first M/Q values found? (y/n): 

>>with N you will then be prompted by:

Enter M/Q value or <RETURN> for list of standard values: 

>>If you enter a <return> here you get a list of possible selections.

Standard options: 
M/Q     1.0   2.0   2.6   4.0   6.0   7.0   8.0  16.0 158.0
MSTEP   9.0  25.0  30.0  36.0  41.0  43.0  45.0  50.0  59.0
Enter M/Q value or <RETURN> for list of standard values: 

>>You must now select individual M/Q values (in any order) and you will 
>>be prompted to select an associated M step.  For almost all 
>>applications the default M.  The possibility of selected other M steps
>>was included in the program for detailed analysis by EICS personnel.
>>Selecting other than the default mass step option will render invalid
>>and flux or velocity space density values returned.
>>
>> Entering 1 <return> selects M/Q=1 (H+) and gives the prompt:

	Enter mass step (1-64) [9.00]: 
>>Respond with a <return> to select mass step 9.  Continuing on to 
>>select M/Q =2 mass step 25, M/Q=4 mass step 36, and M/Q=16, mass
>>step 50 finally returns you to the main screen with an update
>>display for option 12 to reflect the selection:
------------------------------------------------------------------------------
-
| 4. Single time interval                                                      
|
|                                       12. Use selected M/Q values:           
|
| 5. no specific mode selected              M/Q    1.00  2.00  4.00   16.00    
|
|                                           MSTEP  9.00 25.00 36.00   50.00    
|
|                                                                              
|
| 6. Use MD2                            13. Don't write any plot information   
|
------------------------------------------------------------------------------
-

>>The EICS program creates two outputs, both of which can be written to a 
>>file or to the screen.  Option 13 selects a compressed format.  EICS 
>>personnel can provide, on request, FORTRAN code that reads this 
>>compressed file for further processing.  If option 13 is selected you 
>>are prompted with

	Make files for plots? (y/n) 

>>Responding Y results in the prompt 

	Do you want to run FPPLOT afterwards? (y/n) 
>>Answering yes to this prompt will cause a non fatal error message
>>to appear on the screen at the end of every accumulation cycle.  The 
>>option to plot files (i.e. run the FPPLOT program) in series with
>>the EICS program is not supported.
>>
>>if this option is selected (Y above) then the compressed output will
>>be written in your current working directory with a file name 
>>    FP_DATA.DAT     You can rename or redirect the output by
>>using the VMS DCL ASSIGN command before running the EICS program.
>>See the VAX DCL manual for more information.
>>
>>Option 14 turns the second output format, the one that is NOT 
>>compressed, off or on.  Selecting option 14 causes the prompt:

	Do you want to print now? (y/n) 

>>The default is to output only the NON compressed format.  
>>If the print option is selected the output is directed to a file 
>>called FOR108.DAT.  You can rename or redirect the output by
>>using the VMS DCL ASSIGN command before running the EICS program.
>>See the VAX DCL manual for more information.
>>   The file OPTICAL_DEVICE:[EICS]ANNOTATED_OUTPUT_LISTING.TXT
>> on this volume gives annotated listings of the FOR108.DAT files.
>>
>>
>>Option 15 controls the geophysical parameter output.  Selecting
>>option 15 gives the prompt:

Final output format codes:
     0: Counts     1: Counts/Sample     2: Flux     3: Phase Space Density
Enter final output type: [2]: 

>>The default is Flux (2), but you can select total counts (0), 
>>counts/sample (1) or phase (velocity) space density(3).  The units are
>>total counts, counts per instrument accumulation period, number 
>>flux in units of 1/(cm^2-sec-sr-keV), and phase (velocity) space density in
>>units of sec^3/km^6.          In addition to
>>counts, counts/sample, flux or velocity space density the total 
>>number of samples or the one standard deviation uncertainty in the 
>>counts/sample, flux or velocity space density are given in the output
>>listing.   The file OPTICAL_DEVICE:[EICS]ANNOTATED_OUTPUT_LISTING.TXT
>> on this volume gives annotated listings of the FOR108.DAT files.
>>
>>after selecting the output type you will be again prompted"

	Do you want to print the ED? (y/n) 

>>If you answer yes to this the output listing selected by option 15
>>will include an uncalibrated output based on the raw counts detected
>>by a sensor that monitors the input signal after energy analysis but
>>before mass selection.  The file
>>OPTICAL_DEVICE:[EICS]ANNOTATED_OUTPUT_LISTING.TXT 
>>on this volume gives annotated listings of the FOR108.DAT files. 
>>
>>
>>As noted above select option 0 to start accumulating data, or option 
>> -1 to exit the program.
>>
>> DIAGNOSTIC OUTPUTS:
>>
>>When the program is running information similar to that shown below
>>will appear on your terminal.  These outputs are normal.
>>

:UNFLAG 4/16/81
CALESTP: 13 MAY 81
$$$$$$$$$$$NEW IEFLG IN CALESTP   2  $$$$$$$
CALMSTP:  16 JULY 81
from fpacum times, jrtcode        84004    53999522       84004    54299996
      31248           0
 CONVERTING TO FLUX
Outputting /FPBUF/ to unit  108  the DCBS must be set

NOTE : Additional Information on the EICS Mode Catalog follows :
			    EICS

		MODIFIED:  June 5, 1981


MEASURED PARAMETERS:

	The EICS instrument returns a count rate roughly proportional
to flux.  Only one mass/energy/angle interval is sampled at a time.  It
is impractical to sample all possible mass/energy/angle settings
sequentially, since there are 32 energy steps(ESA), 32 RPA settings,
64 mass steps, and 192 measurements per spin period.  The EICS modes
step though this mass/energy/angle space in various ways to optimize
the temporal resolution of specific parameters.

	We have so far identified three basic types of science operations:
"DRUM", "FAST", and "LOAD".   "DRUM" and "FAST" operations use a 15 point
plus background energy spectrum that covers the full instrumental 
energy range 0 to 17 keV/e.

	"DRUM" operations emphasize angular information at the expense of
temporal resolution of energy spectra.   Basically the "DRUM" operations
cycle through 4 mass settings in 1/8 second (7.5 degrees) and sample a
fixed energy channel for a full spin (6 seconds).  The "DRUM" modes so
far identified (with the exception of the PODM1 mode described below)
take 16 spins (96 seconds) to cover the standard 15 energy steps plus
background.  We improve the temporal energy resolution by stepping 
through energy steps in an up/down fashion, scanning low to high
energy values in 4 spins (24 seconds).  In this manner we obtain
a 4 point energy spectrum in 24 seconds, 8 points in 48, 12 in
72, and the standard 15 points plus background in 96 seconds (16 spins).

	"FAST" operations emphasize energy and angular information at
the expense of obtaining simultaneous data 
from different masses.  "FAST" operations have a 4 spin (24 second) 
cycle time.  During each spin the instrument samples 8 energy settings
sequentially taking 1/4 second (15 degrees).  The energy spectrum is
obtained 24 times for a fixed mass setting in the 6 second spin period.
The first two spins of the "FAST" cycle cover 8 energies for two masses,
the second two spins complete the energy coverage (standard 15 energy
steps plus background) for the same two masses.  Note however that
the POFT1 mode described below is slightly different.


	"LOAD" operations provide the poorest time resolution, but sample
all energy and optionally all mass steps.  These modes will be used 
extensively 
in early operations to obtain line shape information.  See the detailed
descriptions of LODM1, L0DM2, and LOSC1 below




		NAMING CONVENTION:      XXYYN

WHERE:
	XX are two letters specifying the prime geophysical regions for 
		use of the mode.

		Auroral		AR
		Cusp		CP
		Pole		PO  USE WITH CAUTION...SEE BELOW..
		"LOAD"		LO   (See descriptions below)
		Test		TE
		Calibrate	CA

	YY are two letters specifying the type of operations (see above)

		DRUM		DM
		FAST		FT
		SCAN		SC   (See LOSC1 below)
		ED1/ED2		ED1/ED2  (For calibration modes)

	N is a serial number


	There are also a number of special hybrid modes listed at
the end of this Cataloge.  (PPRA1....)

******************************************************************************

			MODE CATALOG

******************************************************************************

ARDM1:
	Mass:	H+,He++,He+,O+	m/q=1,2,4,16
	Energy:	Standard 15 point spectrum plus background
	Angle:	7.5 degree resolution
	Cycle:	96 seconds-16 spins
		
		4 masses cycled in 1/8 second (7.5 degrees)
		1 energy per spin  (6 seconds)
		4 energies spanning low to high energies in 4 spins (24 seconds)
		15 energies plus background 16 spins (96 seconds)

CPDM1:
	Mass:	H+,He++,O6+,O+  m/q=1,2,2.33,16
	Energy:	Standard 15 point spectrum plus background
	Angle:	7.5 degree resolution
	Cycle:	96 seconds-16 spins

		4 masses cycled in 1/8 second (7.5 degrees)
		1 energy per spin (6 seconds)
		4 energies spanning low to high energies in 4 spins (24 seconds)
		15 energies plus background 16 spins (96 seconds)

PODM1:
************************************************** N O T E *****************

		Do not use this mode where densities exceed ~100 cm-3
		The RPA is set to zero volts and the detectors could be
		degraded

****************************************************************************

	Mass:	H+,HE+,O++,O+
	Energy:	7 Point ESA spectrum plus Background <2keV/e
		16 Point RPA spectrum  0-100 eV/e
	Angle:	7.5 degree resolution
	Cycle:	192 seconds-32 spins

		4 masses cycled in 1/8 second (7.5 degrees)
		1 energy (RPA or ESA) step per spin (6 seconds)
		16 spins in ESA followed by 16 spins in RPA
			Uses the "lowest" 7 ESA steps < 2keV/e
				plus background.  Energy is from low
				to high values twice in 16 spins.  A four
				point ESA spectrum is then obtained in
				four spins (24 seconds)

			Uses 16 RPA steps spanning 0-100eV/e range
				Scans low to high RPA twice in 16 spins
				RPA resolution is then 4 spins (24 seconds)

		96 seconds of ESA information followed by 96 seconds of
			      RPA information

ARFT1:
	Mass:	H+,O+ m/q=1,16
	Energy:	standard 15 point spectrum plus background
	Angle:	15 degrees resolution
	Cycle:	24 seconds-4 spins
		
		8 energies (or 7 + background) in 1/4 second (15 degrees)
		1 mass per spin (6 seconds)
		2 masses in 2 spins (12 seconds)
			Full energy angle H+ and O+ spectra in 2 spins 
			using 8 (or 7 + background) energy steps
		2 masses full 15 point energy spectrum and  background
			in 4 spins (24 seconds)


CPFT1:
	Mass:	He++,O6+  m/q=2,2.33
	
	Energy:	Standard 15 point spectrum plus background
	Angle:	15 degree resolution
	Cycle: 	24 seconds-4 spins

		8 energies (or 7 + background) in 1/4 second (15 degrees)
		1 mass per spin (6 seconds)
		2 masses in 2 spins (12 seconds)
			Full energy angle spectra in 2 spins using
			8 (or 7 + background) energy steps
		2 masses full 15 point energy spectrum and background
			in 4 spins (24 seconds)

CPFT2:
	Mass:	H+,He++  m/q=1,2
	Energy-Angle-Cycle
		Same as CPFT1 above

POFT1:
********************************************** N O T E *********************

		Do not use this mode where densities exceed ~100 cm-3
		The RPA is set to zero volts and the detectors could be
		degraded

****************************************************************************

	Mass:	H+,O+ m/q=1,16
	Energy:	7 Point ESA spectrum plus Background <2keV/e
		16 Point RPA spectrum  0-100 eV/e
	Angle:	15 degrees ESA, 30 degrees RPA
	Cycle:	24 seconds-4 spins

		H+ and O+ sampled on alternate spins (6 seconds)
		2 spins of ESA followed by 2 spins of RPA
		ESA spins
			7 energies and background in 1/4 second (15 degrees)
			1 mass per spin (6 seconds)
			Obtained on 50% of the spins
		RPA spins
			16 RPA steps in 1/2 second (30 degrees)
			1 mass per spin (6 seconds)
			Obtained on 50% of the spins


LOSC1:
	Mass:	Scans all 64 mass steps.  m/q from < 0.7 to >138
	Energy:	Scans all 32 ESA steps
	Angle:	No selection
	Cycle:	Scans even numbered ESA steps upward
		      odd numbered ESA steps downward for a fixed mass 
			step--independent of angle. 
		Steps to next mass step
		Repeats every 64 seconds, 10 2/3 spins, 
			64x32 t1 intervals
			64x32/2 minor frames
	USE:	To survey for rare constituents and to obtain and
		monitor the mass response of the instrument.
		There is little or no comprehensive angular information
		provided by this mode.


LODM1:
	Mass:	H+,He+,O+, background m/q=1,4,16
	Energy:	all 32 ESA steps
	Angle:	7.5 degree resolution
	Cycle:	32 spins-192 seconds
		3 masses and background sampled in 1/8 second (7.5 degrees)
		1 energy per spin (6 seconds)
		16 energies (low to high) in 16 spins (96 seconds)
		32 energies (all ESA steps) in 32 spins (192 seconds)


LODM2:
	Mass:	H+,He++,O+, background m/q=1,2,16
	Energy-Angle-Cycle
		Same as LODM1 above.

CAED1:
CAED2:
	Mass:	H+ and background
	Calibration sequences.  These typically last 64 seconds.
	The frequency of calibration has not yet been firmly set.
	We do not envision more than one calibration per orbit.

*******************************************************************

		HYBRID MODES

*******************************************************************

PPRA1:

	Mass:	First 96 seconds, He++,He+,O++,O+  m/q=2,4,8,16
		Next 24 seconds H+ and O+ m/q=1,16

	Energy:	First 96 seconds- 8 interleaved RPA steps in the range
			          10 eV/e < E/q < 100 eV/e
		Next 24 seconds - Standard 15 point spectrum + background

	Angle:	First 96 seconds	7.5 degrees
		Next 24 seconds		15 degrees

	Cycle:	20 spins   120 seconds

		The first 96 seconds are in a DRUM mode covering
		8 interlaved RPA steps with the RPA set greater
		than at least 10 eV/e.   The next 24 seconds are
		identical to the ARFT1 mode described above


CCSDYDNM000200NSSD0021EMRK0001