Support highlights

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-	The last GRARR track had arrived. CRO had not tracked for nine weeks when Helios-A was launched on 10 November ’74. The vital support of the combined station was flawless during the long process of trans-solar injection of Helios into an extreme elliptical orbit to loop it closely around the Sun before returning to the vicinity of Earth. Data from this joint German-USA mission would be correlated with that from the IMP missions.	+	The last CRO track had arrived. The station had not tracked for nine weeks when '''Helios-A''' was launched on 10 November ’74. The vital support of the combined GRARR and T&C crews was flawless during the long process of trans-solar injection of Helios into an extreme elliptical orbit to loop it closely around the Sun before returning to the vicinity of Earth. Data from this joint German-USA mission would be correlated with that from the IMP missions.
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Revision as of 06:07, 14 January 2007

GRARR was CRO’s workhorse. For most of its life it provided 24 hours-a-day, 7 days-a-week support, averaging around 12 satellite contacts per day, peaking at 450 for the month of December 1967, with passes lasting from a few minutes to several hours. It supported an extraordinarily diverse range of 36 scientific satellites.

The nature of GRARR support though void of astronaut heroes was not lacking in heroic effort by tracking staff. Here are some highlights of CRO GRARR support.

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Interplanetary Monitoring Platform D (IMP-D)

This was the first ‘big’ mission for the GRARR team. It supported the trans-lunar insertion (TLI) of IMP-D on 1 July 1966 on its way for injection into orbit around the Moon – years before CRO USB became prime for Apollo trans-lunarnsertion. Although IMP-D failed to go into lunar orbit, it achieved its objectives when commanded by Carnarvon into a very eccentric Earth orbit with apogees from 70 to 135 Earth diameters and perigees of 6 to 44 Earth diameters. [1]

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Weapons Research Establishment Satellite (WRESAT)

On 29 November 1967, Australia became the fourth nation to place a satellite into orbit. WRESAT was a logical extension of the HAD program which CRO had supported in 1964. Q6 confirmed that a good orbit was achieved and GRARR, as part of STADAN, collected 43.5 minutes of data on the first orbit As an Australian station, it continued a major data collection role from the 73 orbits completed before the satellite batteries expired. WRESAT decayed into the Earth’s atmosphere on 10 Jan 1968 after 642 orbits. [2]

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Test and Training Satellite (TETR)

TETR-A, the first of a series, was carried into orbit as a piggyback load by Pioneer-8 on 8 November ’67. It failed to reach a sufficiently high orbit for handover simulations; nevertheless, CRO GRARR tracked five sets of two or three orbits in the three 20-hour Apollo-5 network simulations. TETR-A had too low an orbit consequently it lasted only two months. It was really launched too late; MSFN handovers had already been well rehearsed with the more realistic Lunar Orbiter missions. The GRARR crew, with ‘house-keeping’ control of the satellite, was usually rather cheeky to the MSFN crew threatening to switch the spacecraft off momentarily as it passed overhead.

TETR-B was launched piggyback on Pioneer-9. It was thought to be faulty but an “extremely successful” combined operation of the CRO MSFN and GRARR systems, controlled in real-time by TETR Ops, rescued the satellite. [3] It reached the higher orbit required for MSFN handover simulations for future Apollo missions.

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Geodetic Satellite B (GEOS-B)

Geos-B was launched on 11 January ’68 into a high retrograde orbit; maximizing multiple-station visibility periods for geodetic [4] measurement. It was designed to enable the precise location of participating observation stations to within 10m. The Mobile Laser and the Tracking Camera were brought to Carnarvon to take part in this process.

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Biosatellite (Bios)

GRARR telemetry and command facilities were enhanced for the Bios missions. Bios-1 failed to return to Earth with its biological specimens and Bios-2 re-entry was brought forward due to communication difficulties. Bios-3 was more dramatic.

Bios-3 was the closest GRARR came to the glamour of manned space when it was launched on 29 June 1969 carrying Bonnie, a pigtail (Macaca ‘Nemestrina’)monkey. The mission was planned to last 30 days to test the effect of weightlessness on brain states, behavioural performance, cardiovascular state and other biomedical aspects. But it appears the capsule was too cold and Bonnie became listless; refusing to eat and drink. After nearly 9 days, CRO’s off-duty GRARR crew was recalled to initiate an emergency landing.

Bonnie died just 8 hours after re-entry; “presumed to be from a massive heart attack brought on by dehydration”. [5] The GRARR crew death had been intensely involved in Bonnie’s care in the previous week and had observed the rapid deterioration of his health over several days. His death was an emotional blow even greater for them than the loss of the three Apollo-1 astronauts.

Limited results from the first three missions led to the cancellation of the remaining Bios missions.

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Nimbus

In February ’72 the GRARR VHF antenna was taken out of service for four months for the crew to deal with six years of corrosion in the salt-laden coastal atmosphere. Old anodising was scraped off, patches of corrosion were removed and the clean surfaces were re-anodised. [6] From this time onward the GRARR crew was permanently reduced to two shifts with the surplus personnel reassigned to other positions. While the VHF antenna was out of action, a Yagi antenna was jury-rigged on an AcqAid mount so that GRARR could continue to support Nimbus satellite research on the Earth’s atmosphere and water resources. [7]

During the early stages of this overhaul a network request for support of a Nimbus pass with just eight minutes notice when both GRARR crews were off duty was veery successfully tracked. The pass required support from GRARR, TLM, Computers, Recorders, Ops and Comms. The StaDir reported, “Pointing data was received by voice. The station was fully configured and data flow checked by H-1 by whoever happened to be available around the station. There were no incidents. A remarkable effort.” [8] This would not have been possible without the skills of those ex-GRARR personnel who were then engaged in other positions around the station.

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Atmosphere Explorer C (AE-C)

AE-C was launched in December ‘73 into a highly elliptical orbit with a very low perigee dipping into the thermosphere for atmospheric measurements. It carried an on-board thruster to vary the spacecraft’s orbit attitude between 68°N and 60°S and to move the perigee slowly through the various time zones and latitudes. CRO GRARR received an ‘exceptional support’ TWX for its command activity. [9]

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Synchronous Meteorological Satellite (SMS-A)

SMS-A, launched in May 1974, was the last-but-one new mission supported by both the GRARR and USB. The now one-shift GRARR team (supplemented by ex-RARR staff still at the station) provided 72-hours of continuous command support as the satellite was delicately manoeuvred into a geostationary orbit. A contrite but congratulatory TWX from Mission Control stated “more than we have a right to expect”. [10]

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Helios-A

The last CRO track had arrived. The station had not tracked for nine weeks when Helios-A was launched on 10 November ’74. The vital support of the combined GRARR and T&C crews was flawless during the long process of trans-solar injection of Helios into an extreme elliptical orbit to loop it closely around the Sun before returning to the vicinity of Earth. Data from this joint German-USA mission would be correlated with that from the IMP missions.

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References

[1] Tsiaprakas, K., email to PD, 14 September 2005
[2] Dougherty & James, p70-73
[3] NAA: PP538/1, C358A, December 1968
[4] Geodetic: precise location of a geographical point.
[5] www.astronautix.com/thursday/june29.htm
[6] Garth, M., private communication to PD, February 2005
[7] NAA: PP538/1, C622, Contractor Performance Report (CPR), February 1972
[8] NAA: PP538/1, C622, CPR, July 1972
[9] NAA: PP538/1, C622, CPR, March 1974
[10] NAA: PP538/1, C622, CPR, May 1974