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pre-commit-ci[bot] authored and laspsandoval committed Dec 11, 2023
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70 changes: 35 additions & 35 deletions tools/tests/test_data/spice/imap_2023_101_2023_103_01.ah.bc
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Original file line number Diff line number Diff line change
Expand Up @@ -15,19 +15,19 @@ Modifications:

2012, Jan. 5 NJB Modified file to account for the leapsecond that
will occur on June 30, 2012.

2008, Jul. 7 NJB Modified file to account for the leapsecond that
will occur on December 31, 2008.

2005, Aug. 3 NJB Modified file to account for the leapsecond that
will occur on December 31, 2005.

1998, Jul 17 WLT Modified file to account for the leapsecond that
will occur on December 31, 1998.

1997, Feb 22 WLT Modified file to account for the leapsecond that
will occur on June 30, 1997.

1995, Dec 14 KSZ Corrected date of last leapsecond from 1-1-95
to 1-1-96.

Expand All @@ -43,19 +43,19 @@ Modifications:
1992, Mar. 6 HAN Modified file to account for the leapsecond on
June 30, 1992.

1990, Oct. 8 HAN Modified file to account for the leapsecond on
Dec. 31, 1990.
1990, Oct. 8 HAN Modified file to account for the leapsecond on
Dec. 31, 1990.


Explanation:
------------

The contents of this file are used by the routine DELTET to compute the
The contents of this file are used by the routine DELTET to compute the
time difference

[1] DELTA_ET = ET - UTC
the increment to be applied to UTC to give ET.
[1] DELTA_ET = ET - UTC

the increment to be applied to UTC to give ET.

The difference between UTC and TAI,

Expand All @@ -71,17 +71,17 @@ is declared. Combining [1] and [2] gives

The difference (ET - TAI) is periodic, and is given by

[4] ET - TAI = DELTA_T_A + K sin E
[4] ET - TAI = DELTA_T_A + K sin E

where DELTA_T_A and K are constant, and E is the eccentric anomaly of the
heliocentric orbit of the Earth-Moon barycenter. Equation [4], which ignores
where DELTA_T_A and K are constant, and E is the eccentric anomaly of the
heliocentric orbit of the Earth-Moon barycenter. Equation [4], which ignores
small-period fluctuations, is accurate to about 0.000030 seconds.

The eccentric anomaly E is given by
The eccentric anomaly E is given by

[5] E = M + EB sin M

where M is the mean anomaly, which in turn is given by
where M is the mean anomaly, which in turn is given by

[6] M = M + M t
0 1
Expand All @@ -99,7 +99,7 @@ Thus, in order to compute DELTA_ET, the following items are necessary.

The numbers, and the formulation, are taken from the following sources.

1) Moyer, T.D., Transformation from Proper Time on Earth to
1) Moyer, T.D., Transformation from Proper Time on Earth to
Coordinate Time in Solar System Barycentric Space-Time Frame
of Reference, Parts 1 and 2, Celestial Mechanics 23 (1981),
33-56 and 57-68.
Expand All @@ -108,7 +108,7 @@ The numbers, and the formulation, are taken from the following sources.
Reference System on Algorithms for Computing Time Differences
and Clock Rates, JPL IOM 314.5--942, 1 October 1985.

The variable names used above are consistent with those used in the
The variable names used above are consistent with those used in the
Astronomical Almanac.

\begindata
Expand All @@ -119,32 +119,32 @@ DELTET/EB = 1.671D-2
DELTET/M = ( 6.239996D0 1.99096871D-7 )

DELTET/DELTA_AT = ( 10, @1972-JAN-1
11, @1972-JUL-1
12, @1973-JAN-1
13, @1974-JAN-1
14, @1975-JAN-1
15, @1976-JAN-1
16, @1977-JAN-1
17, @1978-JAN-1
18, @1979-JAN-1
19, @1980-JAN-1
20, @1981-JUL-1
21, @1982-JUL-1
22, @1983-JUL-1
23, @1985-JUL-1
24, @1988-JAN-1
11, @1972-JUL-1
12, @1973-JAN-1
13, @1974-JAN-1
14, @1975-JAN-1
15, @1976-JAN-1
16, @1977-JAN-1
17, @1978-JAN-1
18, @1979-JAN-1
19, @1980-JAN-1
20, @1981-JUL-1
21, @1982-JUL-1
22, @1983-JUL-1
23, @1985-JUL-1
24, @1988-JAN-1
25, @1990-JAN-1
26, @1991-JAN-1
26, @1991-JAN-1
27, @1992-JUL-1
28, @1993-JUL-1
29, @1994-JUL-1
30, @1996-JAN-1
30, @1996-JAN-1
31, @1997-JUL-1
32, @1999-JAN-1
33, @2006-JAN-1
34, @2009-JAN-1
35, @2012-JUL-1
36, @2015-JUL-1
36, @2015-JUL-1
37, @2017-JAN-1 )

\begintext
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