OlIPARTIMOIT OF Tilt AIR FORCE

WINE OF 111( 1116111Tmf

111110MANDON

3 November 1984 .

car:

The attached is sall-eaphmatory. I agree

with Geo Stewart that there is no need for you

to writs UBE spit on this matter

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DEPARTMENT OF THE AIR FORCE

WASHINGTON

OFFICE OF Th ONIZEPt SiCRICTARY 3 November 1964

MEMORANDUM FOR Dr. McMillan

SUBJECT: NRP CORONA Mission 1-1014

L Reference is made to Mr. Vane's 22 October 64 memorandum

to the Chairman, USIB, subject as above (copy attached).

Late last week, in the check and double-check process that is

part of the count-down procedure, the West Coast discovered--to our great

surprise and their considerable embarrassment--that the orbital

parameters set in 1-1014 would not accomplish what we thought they

would. Rather than completely covering Cuba on days 1-4, the orbit

would have covered Cuba only on days 5-8, with small but significant

gaps between swaths.

These orbital parameters were computed several months ago.

As I understand the situation, LMSC generated the data, which supposedly

was chRed by our representative at the AP facility, and then forwarded

to the NRO Operations Center. This is a good example of the

diffused CORONA management responsibilities—note that the CORONA

Program office was not involved in the effort. We have directed SA FSP

to set up necessary procedures immediately, where by the Program

Office reviews and approves all orbital data submitted to the Operations

Center.

4. Over the past weekend, two new sets of orbital parameters

were developed, checked, and validated for the CORONA system--one

for Point Arguello, and the other for the VA FB Thor Pad. The reason

for two sets of parameters is the slightly decreased flexibility of the

TAT at VA FB. Particulars of the two orbits follow:

a. VA FB: This is a 10 day synchronous, 9 day equallyspaced orbit on an inclination of 70 degrees. The mission duration is

9 days (5 on the first bucket). Complete coverage of Cuba, with good

overlap, is acquired on the first five days. All of Russia and China

are covered with no pps over the nine day period. Perigee ranges

from 105 miles at 50° North to 115 miles at 20° North. •

DifIXX:,'A CONTROLLED

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b. PA LC Thor Pad: This is a 9 day synchronous 8 day

equally-spaced orbit on an inclination of 75 degrees. The mission

duration is 8 days (4 on first bucket). Cuba is covered completely,

with good overlap, on the first four days. Other details are similar

to the orbit described above for VA FB.

Since CORONA mission 7-14 must be launched from VA FB

(the PAW Thor Pad is down for modifications), the ten-day.

synchronous orbit described in paragraph 4a will be flown. These

orbital parameters are now being set in 1-14; unfortunately, this

caused us to recycle the count-down to approximately R-19 days, and

we can no longer make the 10 November launch date. The new earget

date is 2.0 November, and we might beat that by a couple of days.

USIB and COMOR will not be disturbed by the later launch

date. Both USIB and COMOR, in approving the mission proposed in

Mr. Vanceis 22 October memo, felt that a launch date of 10 November

was too early after 1-13 (launched 2 November).

7. I will advise COMOR of the new launch date. Since the end

result of the new orbit calculations is almost identical with that

previously proposed, there appears to be no need for Mr. Vance to

write USIB again just to explain technical differences in orbits. You

may wish to advise Mr. Vance of our problems, however, in case the

subject comes up during an ExCom meeting.

1 atch

TCS 6756 cy 3

Tames T. Stewart

,. • Brigadier General, USAF

Director, isf NRO Staff

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