Massachusetts Institute of Technology C. S, Draper Laboratory Cambridge, Massachusetts
LUMINARY Memo
#142
To:
Distribution
From:
Dana Densmore
Date:
18
Subject:
LUMINARY
March 1970 Revisions 144-147
The following changes were incorporated
1)
(PCR The
898)
definition of the flag
was deleted with
2)
READVEL
was
deleted.
the implementation of the rest of
The coding
PCR
that
used
it
898.
(PCR 286) (a) RLS had formerly been moved to share with W- matrix so it could be contiguous with TLAND (PCR 286). But RLS is used in the computation of apogee and perigee which
is
done during rendezvous, and so
write the W-matrix. To correct this, 3)
into Revisions 144-147:
elsewhere.
RLS and TLAND had
it
to be
would over-
moved
This involved considerable shifting of erasables.
1
before Rev 144
AGSK
E4
i
RLS
E4, 1420 (2) E4, 1422 (6)
DLAND 1
RLS
VELBIAS
(b)
Since
set to
and
E4 before
EBANK
(PCR
287)
A bug
in the
=
DLAND
E6, 1771 (2)
TLAND it
AGSK
1
was moved
to
EBANK
was used and reset
cards went
in
(2)
VELBIAS
E5, 1400 (6) E5, 1406 (2)
TLAND E6
E4, 1420 (6) E4, 1426
TLAND
5
\
E5
Rev 144
after
to
4,
E5, 1400 (2) E5, 1634 (6)
E6, 1771 (2)
the
EBANK
E5 afterwards
register had to be in
in
P52,
before and after for the assembler.
N54 calculation done for
the implementation of
VELLOS, which is in reference coordinates, was LOSVEL, which is in stable member coordinates. fixed,
OPT4
PCR
287 was
substituted for
)
4)
(PCR
287)
Coding was put If
5)
R>
999, 99 n.
in to limit the
m.
,
(Anomaly L-lB-11) The fix that was put
more words
range display
in
N54
to 999. 99 n.
999. 99 will be displayed on the
in for this
anomaly
didn't work.
m.
DSKY.
It
would take
was worth unless we do it in interpretive which would take time from Servicer. Until a decision is made on the fix, the coding was put back the way it originally was. (Mass Computation than
it
lost accuracy.
6)
(PCR
982)
Implementation of this before calling
7)
(PCR (a) A
PCR was
corrected by picking up the time
PLANET.
991. 2) fiagbit
was defined as a
summing
enable
flagword
NOTE: As
indicator to be reset at
of uplink data before launch but not after.
was assigned
3
liftoff
liftoff,
to
Bit 11 of
to this.
originally implemented the flag
was called "SYSTFLAG",
was changed to ''NODOP07'' as specified by PCR 996. (b) Coding was added to the UPRUPT routine to sum uplink data and keep a count of the number of uplink characters if it is before earth Later
it
launch.
NOTE: This was implemented 8)
(PCR
incorrectly and fixed later.
988)
A fiagbit was defined that will be used by (P66PROFL) is bit 1 of flagword 0. It is
the Auto P66 coding.
The flag
set to indicate "continue
P66
horizontal velocity nulling. "
9)
(PCR
1015)
R36 was modified average
G
is
to turn on the operator
on to prevent a
POODOO
error
light
abort in PI 2.
and exit R36
if
Originally this
was done
at
because of it
R36
itself,
but
SUPERBANK
we couldnH
problems.
So
can be done with one word fewer (no
148)
it
was rewritten
to save another
call it
is
ALM/END now done
BANKCALL
word and use
with a at
V90PERF, where
at all).
a
BANKCALL
BZF
Later (Rev, instead of a
CCS.
Changes
to the
LUMINARY GSOP:
Section 2 should reflect the changes described above
in:
(1),
(2),
(7),
(8).
Section 4 should reflect the changes described above
in:
(3),
(4),
(6),
(9).
Section 5 should reflect the changes described above
in:
(3),
(4),
(5),
(6),
(7),
(9).
