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24-12-07 01:17
GMT
| Posted by
Ian Chicken
Chapter 3: Ascension - The Present
During the 1970's operations on ASC-1N were
transferred to another Earth Station,
Etam (USA).
It was also upgraded to handle 56kbit data circuits for NASA.
Up to and including 1980 all the International Telegraph and Telephone that was
available on the Island were carried via the SAT-1 cable to London and Cape Town
This comprised of just 2 voice circuits with 1 Telex and
Telegraph Circuit.

Left
and Right: Pictures of the control room in various stages over the years
December 1978 saw the Island's Facilities rapidly
expanded. Cable & Wireless commissioned a second antenna,
providing more up to date systems and providing redundancy / diversity for
NASA's communications.

NEC of Japan provided this station (in 1980) and was built to the Intelsat
Standard B design. It is 33ft in Diameter.
The Station went to traffic on 6th February 1981 on a different Satellite
(Intelsat IV) to AT&T's Andover and BT's Goonhilly Earth Stations.
It originally carried the 56k Data circuits from ASC-1N. Now both stations were
helping NASA's with its new role, that of tracking Space Shuttle's, the first
of which STS-1 being launched on 12th April 1981.
Right:- ASC-2D Earth Station
April 1982 brought the war with Argentina.
Ascension became the staging post for the UK military task force, who set up a
camp on the island albeit a temporary one of tents.
Left:
The Earth Station on Donkey Plain (1980's)
This of course forced the need for
even more communications this time in the form
of telephone, data, telex, telegrams and T.V.
Up till now TV had not been seen at the station, and the first transmission went
out to
Goonhilly on 27th April 1982 at 17:30. continuing until
April 1983.
This period forced restrictions on all communications off the Island and the
situation prevailed until 11th May for Telex and Telegrams and 25th May for
Telephone calls.The forces eventually set up a permanent presence and added
facilities to the Airfield increasing traffic again for the Company.
February 1985 brought another
antenna to the Island, with the BBC fitting a receive only system for the World
Service. Thus transferring their traffic from Cable and Wireless.
At this time ASC-1N was getting old and so it was decided it should be closed
down. ASC-2B took over the main functions of the site on
11th April 1985. ASC-1N was deactivated and stowed on September
23rd 1985
after all uses for it had been completed.

Right:NEC
equipment
Left: NASA equipment
At the same time
the Goonhilly Earth Station was dropped in
favour of British Telecom's
Madley Earth Station.
The station continued to expand with more circuits and destinations being
added.
In 1987 / 1988
yet another update of the island's communications was
needed, this time a link to the island of St Helena
(700 miles away to the South East
of Ascension). Communications between the two
was in the form of a HF Radio Link.
A study was completed to find the best solution. With the Island's telephone
systems also being upgraded,
an Earth Station solution
was decided upon. This station would have an Identical one
built in St Helena.
Again
NEC was commissioned with the work and the Islands took delivery of 2 Standard D
Earth Stations.
They have a diameter
of 22.5ft, and the 2 sites were installed again on Donkey Plain and the Briars
in St Helena.
The first transmission was made from the later on 30th November 1989 at 16:41.
The stations went to traffic in December 1989.
Above:
ASC-4D1 Earth Station for St Helena
While this work was being completed ASC-2B was also having an upgrade with more
modern equipment and wiring
At the end of the 1980's and with the start up again of the
Shuttle Missions after the Challenger disaster, NASA decided to cut back on its
operations and decided to close down its Devils Ashpit site. The doors closed in
May 1990 for the last time, with operations being taken over by satellites
called T.D.R.S. (Tracking Data and Relay System).
With NASA's Closure of it's site, the Ariane launchers needed a new way of being
tracked.
Cable & Wireless were awarded the contract to run the tracking station for the
European Space Agency. The site was installed by the french at a new site at
North East Bay.

Its tracking and telemetry data is sent via the Donkey Plain Earth Station, but
this time to France and on to French Guiana (via Earth Stations in france,
Pleumer Bodou and Bercenay en Othe and
French Guiana's Trou Biran).
Right: The ESA Tracking Station
This tracking system is used in conjunction with a facility at Comfortless
Cove, providing Radar Telemetry.
The E.S.A. site should have completed its first tracking task on 22nd February
1990, but the launch failed 2 minutes after lift off at 00:56.
(AR44 Japanese payload. a ASTRO/NHK JAPAN BS2X).
The eventual flight it tracked first was on the 24th July 1990
(AR44LP with a Kopernikus TDF-2 communications satellite).
The stations have been continually modernised over the years to the point that the Earth Station is now unmanned and is monitored from the Main Office in Georgetown.