IMP-8 Summary File Format
IMP-8 summary file contains data from one 4-day interval and consists of
a header record followed by two or more data recordal, with th last record
indicated by a negative interval number. All records are fixed length
(1820 words).
The first record (Header record) of the file contains the start and stop
times, rates, and other general information pertaining to the time
interval associated with the data summarized in the file.
The data records follow and contain the data point summaries,(i.e. the
pulse height channel numbers of PHA events measured by either the LED or
MED detectors and the number of identical events per priority mode that
were recorded within the time interval specified in the header record).
Each record contains one type of summary, either LED or MED data points.
Summary entries are grouped by event type, with the entries for each event
type sorted in order of decreasing channel number.
The first entries are LED events in the order given in the table following
data Record Formats. The last LED summary entry is followed by an entry of
the data record formats. The last LED summary entry is followed by an
entry of zeros. The following record begins the summary for the MED PHA
data points. Summary entries will begin with D1.E1.-F.-G events (in order
of decreasing channel number) followed by (D&E)2.E1.-F.-G, D1.E1.F.-G,
(D&E)1.E1.-F.-G, and D1.E1.F.G events. The last MED entry is also followed
by an entry of zeros.
Header Record Format
WORD CONTENT
1 Number of 4-day Interval
2 Halfword I - Year
Halfword 2 - Day of Year start time of summary period
3 Milliseconds of Day
4 Halfword 1 - Year
Halfword 2 - Day Of Year stop time of summary period
5 Milliseconds of Day
6 Halfword 1 - Perigee Count at Start of Summary Period
Halfword 2 - Perigee Count at End of Summary Period
7-9 Spare
10 Number of LED Data Records in this file
11-19 Sum (Real) of all counts data (satisfying trend check)
for events
Al,B,C, Al.-B.-C, (A&B)l.-B.-C, (A&B)2.-B.-C, Al.B.-C,
(A&B)l.B.-C, and (A&B)2.B.-C, Respectively.
20-28 Number of counts data readouts used in the sum for each
LED event above, respectively (Base 1600 BPS)
29-37 Number of readouts failing the trend check for each LED
event above, respectively.
38 Total number of LED data points accepted during this
summary period (Base 1600 BPS).
39 Number of MED data records in this file
40-48 Sum (Real) of all counts data (satisfying trend check)
for events
Dl, E, F, G, Dl.El.F, Dl.El.-F.-G, Dl.El.F.-G,
(Dl&El)l.El.-F.-G, and (DI&El)2.El.-F.-G, respectively.
49-57 Number of counts data readouts used in the sum for each
MED event above, respectively. (Base 1600 BPS)
58-66 Number of readouts failing the trend check for each
MED event above, respectively.
67 Total number of MED data points accepted during this
summary period. (Base 1600 BPS)
68-69 Number of LED low gain events detected during this
summary period for event.
(A&B)l.-B.-C and (A&B)l.B.-C, respectively
70-72 Number of MED low gain events detected during this summary
period for event D.E.F.G, D.E.F.-G,
and (D&E)2.E.-F.-G, respectivelv.
73 Number of LED A.B.-C events with T2,T3 = 0,0
74 Number of A.B.-C events with T2,T3 = 0,1
75 Number of A.B.C event with T2,T3 = 1,0
76 Number of (A&B)2.A.B.-C events with T2,T3 = 0,0 and
(A&B)2.A.B.-C rate used
77 Number of (A&B)2.A.B.-C events with T2,T3 = O,l and
(A&B)2.A.B.-C rate used.
78 Number of (A&B)2.A.B.-C events with T2,T3 = 0,0 and A.B.-C rate used.
79 Number of (A&B)2.A.B.-C events with T2,T3 = 0,l and A.B.-C rate used.
80 Number of (A&B)2.A.B.-C events with T2,T3 = 1,0
(neither A.B.-C nor (A&B)2.A.B.-C rate available).
81-90 Spare
91-104 Number of occurrences of A1 rate readout vs. readout values:
91: Number of readouts in range 0-2
92: " " " " " 3-4
93: " " " " " 5-8
94: " " " " " 9-16
95: " " " " " 17-32
96: " " " " " 33-64
97: " " " " " 65-128
98: " " " " " 129-256
99: " " " " " 257-512
100: " " " " " 513-1024
101: " " " " " 1025-2048
102: " " " " " 2049-4096
103: " " " " " 4097-8192
104: " " " " " > 8192
(For each album, the total counts T is divided by the
number of readouts N and used as N readouts of T/N counts).
105-118 Same as 91-104 for B rate.
119-132 Same as 91-104 for C rate.
133-146 Same as 91-104 for A1.-B.-C rate
147-160 Same as 91-104 for (A&B)1.-B.-C rate
161-174 Same as 91-104 for (A&B)2.-B.-C rate
175-188 Same as 91-104 for A1.B.-C rate
189-202 Same as 91-104 for (A&B)1.B.-C rate
203-216 Same as 91-104 for (A&B)2.B.-C rate
217-230 Same as 91-104 for DI rate
231-244 Same as 91-104 for E rate
245-258 Same as 91-104 for F rate
259-272 Same as 91-104 for G rate
273-286 Same as 91-104 for DI.EI.F rate
287-300 Same as 91-104 for DI.EI.-F.-G rate
301-314 Same as 91-104 for DI.EI.F.-G rate
315-328 Same as 91-104 for (DI&EI)1.-F.-G rate
329-342 Same as 91-104 for (DI&EI)2.-F.-G rate
LED Data Record Format
5 Halfwords/Entry x 728 entries = 1820 words
HALFWORD CONTENT
1 Bits 2-5, Event-type T1,T2,T3,T4, where
T1 = 0 for A.B.-C or A.-B.-C event
= 1 for (A&B)2.A.B.-C or (A&B)2.A.-B.-C event
T2 = 1 if the event rate was not available
T3 = 0 if T2 = 0 and the rate was >0
= 1 if " " " " =0
T4 = 0 if L1 .ne. R
= 1 if L1 = R
Bits 6-15, A detector amplitude
2 B detector amplitude
3 Frequency during priority Mode 3
4 " " " " 2
5 " " " " 1
MED Data Record Format
7 Halfwords/Entry x 520 entries = 1820 words
HALEWORD CONTENT
1 Bits 3-5, Event type T1 T2 T3, where
T1 T2 T3 = 101 D1.E1.-F.-G Event 5
= Oll (D&E)2.EI.-F.-G Event 4
= 010 D1.E1.F.-G Event 3
= 001 (D&E)1.EI.-F.-G Event 2
= 000 D1.E1.F.G Event 1
Bits 6-15, D Detector amplitude
2 E detector amplitude
3 F detector amplitude
4 Frequency during priority Mode 4
5 " " " " 3
6 " " " " 2
7 " " " " 1
The ordering of the LED events will be as follows:
T1 T2 T3 T4
1101 (A&B)2.A.B.-C events for which no rare was available
and L1 = R.
1100 (A&B)2.A.B.-C events for which no rate was available
and LI .ne. R.
1011 (A&B)2.A.B.-C events for which rate = 0 and L1 = R
1010 (A&B)2.A.B.C events for which rate = 0 and LI .ne. R
1001 (A&B)2.A.B.C events for which rate > 0 and LI = R
(A&B)2.A.B.C events for which LI = R
1000 (A&B)2.A.B.-E events for which rate > 0 and LI
(A&B)2.A.B.C events for which LI i R
0101 A.B.C events for which no rate was available and LI = R
0100 A.B.C events for which no rate was availalbe and LI .ne. R
0011 A.B.-C events for which rate = 0 and LI = R
0010 A.B.-C events for which rate = 0 and LI .ne. R
0001 A.B.-C events for which rate > 0 and LI = R
A.-B.-C events for which LI = R
0000 A.B.-C events for which rate > 0 and L1 .ne. R
A.-B.-C events for which L1 .ne. R