Voyager 1 and 2 LECP Pages

Fundamental Technologies

Voyager LECP Pages

Description of Full Resolution Print (FRP) - Derived from MRT

File Name Interpretation for Full Resolution Print

Character #	Meaning
1	"V" for Voyager
2	"1" or "2" for Voyager 1 or Voyager 2
3 and 4	Last 2 digits of Year of File Beginning (‘77’ = 1977)
5, 6, and 7	Day of Year for File Beginning (1 = January 1)
8 and 9	"AA", "BA","CA",…"ZA","AB","BB",… thru "ZZ", identifies the sequence of files, each containing 20,000 records.
10 and 11	"M" identifying this file as Full Resolution Print (FRP) for Cruise or Far Encounter
12 and 13	"01" through "16" identifying which Far Encounter/Cruise Rate Group is present (see table 3)
14, 15, 16 and 17	".CSV" Identifying this file as Comma Separated Variable ASCII form with the first record containing column labels and all subsequent records to end of file having items as described in Table 2 below. Note that missing data is denoted in two ways—successive commas with no intervening space in the "counts" field denotes missing data and the corresponding "T_acc." Field will show "0"

Description of Column Contents for Near Encounter and Cruise FRP

Column Number	Contents Name	Units
1	Year	Year of Data Item Beginning
2	Day	Day of Data Item Beginning (DOY 1=January 1)
3	Hour	Hour of Data Item Beginning
4	Minute	Minute of Data Item Beginning
5	Second	Second of Data Item Beginning
6	STEP	LECP Stepping Platform Position (0-7)
7	MOV.	Motor Movement Flag (0=no movement, 1 = movement during accumulation)
8	Counts in Channel	Counts per accumulation (see Table 3)
9	T_acc.	Accumulation time in seconds of above channel
10, 11, …	Repeat for additional channels (see Table 3)

Data Columns 8 through 29 Contents for Cruise and Far Encounter Print Groups

Group	Col. # 8	Col. # 10	Col. # 12	Col. # 14	Col. # 16	Col. # 18	Col. # 20	Col. # 22	Col. # 24	Col. #26	Col. #28
1	PL01	PL02	PL03	Eb04	Eb’04
2	Eb01	Eb’01	Eb02	Eb’02	Eb03	Eb’03	Eg06
3	A39	A33	P32	P31
4	Eg07	Eg08	Eg09	Eb05	Eb’05
5	P1	E44	A3	P10
6	PL04	PL08	AR	E0	E1	E2	E3	E4	E5	AL	P16
7	P11	P23	P27	A4
8	A46	A13	M47	A17	A28	M38
9	M35	PL05	PL06	PL07
10	E45	ALAR	A12	A24
11	M34	L5	L18	L14
12	M6	M7	M19	H36
13	H8	H43	M25	H9
14	M29	H22	H26	H30
15	AL01	AL02	E37	H21
16	M15	M20

Note 1. Passbands and Geometrical Factors corresponding to each of the labels are given in Tables 4 and 5 below for Voyager 1 and 2 respectively.
Note 2. Odd number columns contain the accumulation time in seconds for the immediately preceding counts. If accumulation time is 0., then no observation was made for this column at this time.

Passbands and Geometrical Factors for Voyager 1 LECP Far Encounter and Cruise Channels
Passbands and Geometrical Factors for Voyager 2 LECP Far Encounter and Cruise Channels

File Names for Near Encounter CSV Files

Character #	Meaning
1	"V" for Voyager
2	"1" or "2" for Voyager 1 or Voyager 2
3 and 4	Last 2 digits of Year of File Beginning (‘77’ = 1977)
5, 6, and 7	"JNE" standing for Jupiter Near Encounter (Voyager 1 1979 Day 63 19:41:36 SCET through Day 65 05:41:59.94 ) or "SNE" (Voyager 2 1981 Day 238 01:09:35.42 SCET through 238 07:01:33.8 SCET)
8	"A","B","C", "D","E", "F", "G", or "H" … identifies a sequence of files, each containing 20,000 records.
9 and 10	"NG" identifying this file as LECP Near Encounter Mode
11 and 12	"01" through "09" identifying which Near Encounter Rate Group is present (see table 3 below)
13, 14, 15, and 16	".CSV" identifying this file as Comma Separated Variable ASCII form with the first record containing column labels and all subsequent records to end of file having items as described in Table 2. Note that missing data is denoted in two ways—successive commas with no intervening space in the "counts" field denotes missing data. The corresponding "T_acc." Field will show "0"

Column Contents for Near Encounter Full Resolution Print Files

Column Number	Contents Name	Units
1	Year	Year of Data Item Beginning
2	Day	Day of Data Item Beginning (DOY 1=January 1)
3	Hour	Hour of Data Item Beginning
4	Minute	Minute of Data Item Beginning
5	Second	Second of Data Item Beginning
6	STEP	LECP Stepping Platform Position (0-7)
7	MOV.	Motor Movement Flag (0 = no movement, 1 = movement during accumulation)
8	Counts in Channel	Counts per accumulation
9	T_acc.	Accumulation time in seconds of above channel
10, 11, …	Repeat for additional channels (see Table 3)

Contents of Columns 8-22 for Near Encounter FRP

Group #	Col. #8	Col. #10	Col. #12	Col. #14	Col. #16	Col. #18	Col. #20	Col. #22	Col. #24
1	PL01	PL02	PL03	Eb04	Eb’04	(Note 3.)
2	Eb01	Eb’01	Eb02	Eb’02	Eb03	Eb’03	Eg06	(Note 3.)
3	Pd09	Pd’09	Pd10	Pd’10	Pd11	Pd’11	Ad03	Ad’03	(Note 3.)
4	Eg07	Eg08	Eg09	Eb05	Eb’05	(Note 3.)
5	PSA3	PSB3	PAB12	PAB13	(Note 3.)
6	PL04	Zd01	Zd’01	ESA0	ESB0	(Note 3.)
7	PSA1	PSB1	PSA2	PSB2	(Note 3.)
8	AL01	AL02	PL08	Ad04	Ad04	(Note 3.)
9	EAB10	PL05	PL06	PL07	(Note 3.)

Note 1. Passbands and Geometrical Factors corresponding to each of the labels are given in Tables 4 and 5 for Voyager 1 and 2 respectively.
Note 2. Odd number columns contain the accumulation time in seconds for the immediately preceding counts. If accumulation time is 0., then no observation was made for this column at this time.
Note 3. Repeats of all data columns to the left in units of counts/second.

Passbands and Geometrical Factors, Voyager 1 Near Encounter FRP

Ch.#	Name	Low(MeV/Nuc.)	High (MeV/Nuc.)	Mean (MeV/Nuc.)	Geometrical Factor (cm² sr)	Logic
1	Eb01	0.015	0.037	0.020	0.00600
2	Eb’01	0.015	0.500	0.020	0.00012
3	Eb02	0.037	0.061	0.045	0.00600
4	Eb’02	0.037	0.500	0.045	0.00012
5	Eb03	0.070	0.112	0.090	0.00600
6	Eb’03	0.070	0.500	0.090	0.00012
7	Eb04	0.130	0.183	0.120	0.00600
8	Eb’04	0.130	0.500	0.120	0.00012
9	Eb05	0.200	0.500	0.200	0.00600
10	Eb’05	0.200	0.500	0.200	0.00012
11	Eg06	0.252	2.000	0.250	0.00200
12	Eg07	0.480	2.000	0.500	0.00200
13	Eg08	0.853	2.000	0.900	0.00200
14	Eg09	2.100	5.000	2.000	0.00200
15	E44	0.350	1.500	0.500	1.31000
16	E45	2.500	100.	2.000	1.31000
17	E37	6.000	100.	6.000	1.31000
18	PL01	0.030	0.053	0.025	0.04020
19	PL02	0.053	0.085	0.050	0.04020
20	PL03	0.085	0.139	0.100	0.04020
21	PL04	0.139	0.200	0.150	0.04020
22	PL05	0.200	0.550	0.250	0.04020
23	PL06	0.540	1.050	0.600	0.04020
24	PL07	1.050	2.030	1.000	0.04020
25	PL08	2.030	4.010	2.500	0.04020
44	AL01	0.980	1.770	1.000	0.04020
45	AL02	1.770	4.220	2.500	0.04020
77	ESA0	2.500	99.999	2.500	0.49350	A-B COINC.
78	ESB0	8.500	99.999	8.500	0.94620	B 4 PI SR
79	EAB10	8.500	99.999	8.500	0.05040	A-B COINC.
80	P d'09	0.285	5.020	0.250	0.00084	d'
81	P d'10	0.480	2.580	0.600	0.00084	d'
82	P d'11	0.725	1.640	1.000	0.00084	d'
83	Pd09	0.285	5.250	0.250	0.00260	d
84	Pd10	0.480	2.720	0.600	0.00260	d
85	Pd11	0.725	1.580	1.000	0.00260	d
86	PAB12	54.000	87.300	50.000	0.05040	A-B COINC.
87	PAB13	87.300	152.000	100.000	0.05040	A-B COINC.
88	PSA1	15.800	158.000	15.000	0.49350	A 2 PI SR
89	PSA2	15.800	49.000	25.000	0.49350	A 2 PI SR
90	PSA3	16.300	26.200	25.000	0.49350	A 2 PI SR
91	PSB1	54.000	174.000	50.000	0.94620	B 4 PI SR
92	PSB2	54.000	87.300	50.000	0.94620	B 4 PI SR
93	PSB3	54.000	59.000	50.000	0.94620	B 4 PI SR
94	Ad'03	0.480	2.450	0.600	0.00084	d'
95	Ad'04	0.780	1.410	1.000	0.00084	d'
96	Zd'01	0.405	18.800	0.600	0.00084	d'
97	Ad03	0.480	2.580	0.600	0.00260	d
98	Ad04	0.780	1.480	1.000	0.00260	d
99	Zd01	0.400	19.800	0.600	0.00260	d

Passbands and Geometrical Factors, Voyager 2 Near Encounter FRP

FAT #	Name	Low(MeV/Nuc.)	High (MeV/Nuc.)	Mean (MeV/Nuc.)	Geometrical Factor (cm² sr)	Logic
1	Eb01	0.013	0.035	0.020	0.00200
2	Eb’01	0.013	0.035	0.020	0.00200
3	Eb02	0.035	0.061	0.045	0.00200
4	Eb’02	0.035	0.061	0.045	0.00200
5	Eb03	0.061	0.112	0.090	0.00200
6	Eb’03	0.061	0.112	0.090	0.00200
7	Eb04	0.112	0.183	0.120	0.00200
8	Eb’04	0.112	0.183	0.120	0.00200
9	Eb05	0.183	0.500	0.200	0.00200
10	Eb’05	0.183	0.500	0.200	0.00200
11	Eg06	0.252	2.000	0.250	0.00200
12	Eg07	0.480	2.000	0.500	0.00200
13	Eg08	0.853	2.000	0.900	0.00200
14	Eg09	2.100	5.000	2.000	0.00200
15	E44	0.350	1.500	0.500	1.31000
16	E45	2.000	100.	2.000	1.31000
17	E37	6.000	100.	6.000	1.31000
18	PL01	0.024	0.048	0.025	0.12000
19	PL02	0.048	0.080	0.050	0.12000
20	PL03	0.080	0.137	0.100	0.12000
21	PL04	0.137	0.215	0.150	0.12000
22	PL05	0.215	0.540	0.250	0.12000
23	PL06	0.540	0.990	0.600	0.12000
24	PL07	0.990	2.140	1.000	0.12000
25	PL08	2.140	3.500	2.500	0.12000
44	AL01	1.040	1.850	1.000	0.12000	CALC.
45	AL02	1.850	3.700	2.500	0.12000	CALC.
77	ESA0	2.500	99.999	2.500	0.49350	A-B COINC.
78	ESB0	8.500	99.999	8.500	0.94620	B 4 PI SR
79	EAB10	8.500	99.999	8.500	0.05040	A-B COINC.
80	Pd'09	0.285	5.020	0.250	0.00084	d'
81	Pd'10	0.480	2.580	0.600	0.00084	d'
82	Pd'11	0.725	1.640	1.000	0.00084	d'
83	Pd09	0.285	5.250	0.250	0.00260	d
84	Pd10	0.480	2.720	0.600	0.00260	d
85	Pd11	0.725	1.580	1.000	0.00260	d
86	PAB12	54.000	87.300	50.000	0.05040	A-B COINC.
87	PAB13	87.300	152.000	100.000	0.05040	A-B COINC.
88	PSA1	15.800	158.000	15.000	0.49350	A 2 PI SR
89	PSA2	15.800	49.000	25.000	0.49350	A 2 PI SR
90	PSA3	16.300	26.200	25.000	0.49350	A 2 PI SR
91	PSB1	54.000	174.000	50.000	0.94620	B 4 PI SR
92	PSB2	54.000	87.300	50.000	0.94620	B 4 PI SR
93	PSB3	54.000	59.000	50.000	0.94620	B 4 PI SR
94	Ad'03	0.480	2.450	0.600	0.00084	d'
95	Ad'04	0.780	1.410	1.000	0.00084	d'
96	Zd'01	0.405	18.800	0.600	0.00084	d'
97	Ad03	0.480	2.580	0.600	0.00260	d
98	Ad04	0.780	1.480	1.000	0.00260	d
99	Zd01	0.400	19.800	0.600	0.00260	d

NOTE: Channels 77-99 here are duplicated from Voyager 1 and should be considered nominal only.

Description of Column Contents for Cruise 5A FRP

Column Number	Contents Name	Units
1	Year	Year of Data Item Beginning
2	Day	Day of Data Item Beginning (DOY 1=January 1)
3	Hour	Hour of Data Item Beginning
4	Minute	Minute of Data Item Beginning
5	Second	Second of Data Item Beginning
6	STEP	LECP Stepping Platform Position (0-7)
7	MOV.	Motor Movement Flag (0 = no movement, 1 = movement during accumulation)
8	Counts in Channel	Counts per accumulation (see Table 12)
9	T_acc.	Accumulation time in second of above channel
10, 11, …	Repeat for additional channels (see Table 3)

Data Columns 8 Through 28 Contents for Cruise 5A FRP

Print Group	Col. 8-9	Col. 10-11	Col. 12-13	Col. 14-15	Col. 16-17	Col. 18-19	Col. 20-21	Col. 22-23	Col. 24-25	Col. 26-27	Col. 28-29
1	PL01	PL02	PL03	Eb04	Ebb’04
2	Eb01	Eb’01	Eb02	Eb’02	Eb03	Eb’03	Eg06
3	A39	A33	P32	P31
4	Eg07	Eg08	Eg09	Eb05	Eb’05
5	P1	E44	A3	P10
6	PL04	PL08	AR	E0	E1	E2	E3	E4	E5	AL	P16
7	P11	P23	P27	A4
8	A46	A13	M47	A17	A28	M38
9	M35	PL05	PL06	PL07
10	E45	ALAR?	A12	A24
11	M34	L5	L18	L14
12	M6	M7	M19	H36
13	H8	H43	M25	H9
14	M29	H22	H26	H30
15	AL01	AL02	E37	H21
16	M15	M20

Note 1. Channel names are the same as given in Tables 4 and 5 for Voyagers 1 and 2, respectively.
Note 2. Each entry above represents two data items: First, the accumulated counts and second, the accumulation time. If the accumulation time is zero, no datum was acquired for that entry.
Note 3. All data acquired after 1990 day 228 14:18:49 from Voyager 1 and after 1990 day 195 12:13:41 are in CR5A mode.

Return to Voyager LECP Data Analysis Handbook Table of Contents.
Return to Fundamental Technologies Home Page.

Last modified 8/4/05, Tizby Hunt-Ward
tizby@ftecs.com