The technician had to identify the part, determine its manufacturer part number, run down to the logistics counter, look up the FSN, convince the store man of the urgency without upsetting him, and get back to the operations area in the quickest time possible. Depending on the phase of the mission or the priorities of the CMD and TLM functions, the configuration could vary depending upon the number of stations supporting, the type and seriousness of a persistently intermittent hardware or software problem, or the estimated time to fix or to isolate the problem. TLM magnetic tapes included a Systems tape, a Recovery Fault/Log Dump tape and high speed output Data Log tape. The Logistics Section occupied a large area in the operations building and contained rows of storage racks housing a vast array of spare parts and replacement units. The left hand console was operated by a senior managerial person, referred to as OPS1, responsible for all operations relating to tracking, signal reception, signal subcarrier processing and other subsystems of the USB area. The video signal, which was frequency modulated directly on to the S-Band carrier in the spacecraft, was received by the station via the 50 MHz FM subcarrier. The 26-m antenna at Honeysuckle Creek was purpose-built for the Apollo program. 1. After the successful completion of CADFISS testing the station came under the control of the MCC at Houston when it entered a countdown of seventy minutes (H-70) to the initial acquisition of the spacecraft signal (AOS). Parkes Observatory was one of three tracking stations that beamed live images of the moonwalk to the world. 3. ranging codes and a television signal. A separate electric power supply referred to as the ‘tech bus’ was provided for all of the mission critical operations equipment and supplied from separate generator(s) to the general lighting and power requirements of the rest of the building. Scan: Stirling Finlay. The tapes were sent from Goddard to a storage facility of the National Archives in late 1969. All the sequential steps in a calculation were carefully laid out in a flow chart form before coding was attempted. Another special feature of the interconnecting cabling was a switching rack (type 1299 Switch Board) consisting of groups of individual switch modules. High powered S Band (2.1 â 2.2 GHz) frequencies constituted a considerable radiation hazard. The diesel engines were manufactured by Caterpillar with power capacities ranging from three 500 kVA units, two 350 kVA units and two 250 kVA units. Collins Microwave and Wideband Rack during the Deep Space era. These TTY units could be patched directly to the low-speed incoming lines as they were fitted with a ‘blinding code’ unit which ignored normal TTY traffic and only passed the spacecraft command messages to the CMD computer. Note the two Ampex VR600 2-inch helical scan video-tape NASA needed tracking stations — 14 in total, dotted around the planet — to keep in contact. Bob Campbell in the Comms Section working on a teletype machine. The days leading up to Apollo 11 were nerve-racking just in the anticipation. That changed when we were called to an all-hands meeting and told that Apollo 8 would orbit the moon. Biomed data from the astronaut’s suits along with engineering data from the LRV was received and processed through the Analog Multiplexer Quantizer (AMQ) units and passed onto the TLM computer. Each I/O channel used a ninety-way, shielded, one inch dia. Photo: Hamish Lindsay â via John Saxon. The H-70 interface testing involved the MCC conducting a further series of data flow tests which were more aligned with the upcoming events or phase of the mission timeline. Kamala Harris' stepdaughter won the inaugural fashion show. When I first arrived in Spain the attitude was relaxed. Each board with its discrete components was hermetically sealed in epoxy resin and consequently they were unrepairable on site. Each computer, being of the militarized type, was fitted with a special control panel switch labeled ‘battle short’. The Guam tracking station was to play a critical role in the return of Apollo 11 to Earth. The Subcarrier Data Demodulator System (SDDS) demodulated signals from the S-band (USB) receiver systems of Honeysuckle Creek and Tidbinbilla stations and from the Parkes Radio Telescope. Close up of the Univac 1540 Magnetic Tape Unit. written in the machine code format. StaDir Tom Reid explains to the Prime Minister. You get 100 guys together, working, eating, drinking — somebody is going to get on somebody else’s nerves. There was hard and fast rule: no fighting. Power supply for each military computer system required the American Standard 115 Volt, 3 phase, 60 Hertz which was provided by individual remote controlled rotary converters situated in the building basement. Privacy Notice On July 18, while Apollo 11 was enroute to the moon, Tidbinbilla/MSFN Wing had a major failure in transmitter power supply 2 at 08:25 GMT while the station was tracking Apollo 11 in a three-way mode. Henry Lynch checks Univac computer on Ascension Island, 1969. There were stations at: Honeysuckle Creek near Canberra and Carnarvon in Western Australia, for tracking crewed spacecraft. Photo courtesy Milton Turner. The Apollo 11 … Published: July 13, 2009 -- … A major feature of the whole computer complex was the common input/output (I/O) user interface cabling arrangement. console in the centre. The latter was more preferable, of course, being without any hard connection. The precise geographical antenna position was eventually determined to a very high degree of accuracy using Very Long Based Interferometer (VLBI) techniques. © 2021 NYP Holdings, Inc. All Rights Reserved, Biden put on a show of 'unity' — will he stick to it? Line Printer left foreground, Punch Card Reader center left, Line Printer left rear, eight Magnetic Tape Units at rear with four Disc Drive Units in front, two Operators Consoles in the centre. The second column is the machine code instruction along with its operand modifiers, index registers and I/O channel numbers. The command computer received commands from Houston to uplink to the spacecraft and the telemetry computer received data from the spacecraft and shipped it back to mission control. Univac Type 1540 Magnetic Tape Unit for the 642B computer. Special radio stations transmitting in the HF short-wave bands known as WWV and WWVH were used for a coarse time check. Life was sort of boring. The tracking stations provided a real time, two-way, high-speed connection between the Apollo Guidance Computer (AGC) in the spacecraft through the ground stations CMD/TLM computers, then onto the real time world-wide NASCOM network hub at the Goddard Space Flight Center in Greenbelt MD. Hamish Lindsay. Photo: Hamish Lindsay. Longitude. The Acquisition Aid at the apex of the quadrapod. Stirling Finlay in the Wire Room c. 1973. Post was not sent - check your email addresses! Photo: This machine coding was used on the NASA Apollo tracking stations until higher order languages, assemblers and compilers such as BASIC, FORTRAN and SYCOL were provided by UNIVAC.”, Photo: Hamish Lindsay. From a Super 8 movie by Ed von Renouard. and finally to the Real Time Computer Complex at the Mission Control Center in Houston, Texas. Shown in the picture is a machine code listing of an app. We were part of a great adventure. The TLM computer also informed the CMD computer of the MAP via the intercomputer channel at which time the CMD computer wrote a further record to the command history magnetic tape. The logistic officers (store men/women) were sometimes unreasonable and usually most emphatic: ‘no FSN, no part’, even if you could see it and point to it on the shelf. 2. Station Director Tom Reid, Astronaut The guy asked if I wanted to know what the pay would be. Both CP1 and CP2 had four tape handlers duplexed to each computer while CP3 and CP4 shared two tape handlers. Special purpose processors handled both the Pulse Amplitude Modulation (PAM) and Pulse Code Modulation (PCM) data streams received from the Signal Data Demodulation Subsystem (SDDS). Photo: Australian News and Information Service. Photo: Hamish Lindsay, via Martin Geasley. All such items were carefully labeled and packaged at the end of each operations shift for shipping to the GSFC archive. During Apollo 11, at twenty minutes prior to LM lift off from the moon the MCC requested both the Madrid and Ascension Island tracking stations to confirm that they had their computer Jump Key number 1 switch in the ‘down’ position. The simulated S-Band signal from the Sim. Spacecraft telemetry data was sent from the PAM, PCM and AMQ subsystems to the TLM computer. cable to connect with each peripheral device. The Transport Officer had to contend with sudden changes due to a late car arrival, a report of a vehicle problem, a vehicle accident, a procrastinating engineer authorizing last minute overtime, all without having a nervous breakdown. Voice communications with the Sim. All light fittings used throughout the station were fitted with incandescent bulbs as fluorescent lights could have been a source of interference. 3 for engineering/technical discussions between stations and MCC/Goddard Spaceflight Centre (GSFC). These provided multiple digital readouts, electronic pulses and various coded formats for time tagging all data produced on and/or leaving the station. Large, Larger (2.6MB). Everything had to be perfect from Apollo 6 through Apollo 10 for Apollo 11 to land on the moon. The Ponce De Leon (PDL) Tracking Station occupies 1.4 acres on U.S. Coast Guard property south of the Ponce De Leon Inlet at New Smyrna Beach, Florida, and is part of NASA's Goddard Space Flight Center Spaceflight Tracking and Data Network. These two staff functions tied all of the stationâs operations activities together and supervised the mission support operations, readiness testing and simulation exercises as well as the coordination with GSFC and MCC personnel. It can be seen from the above that ground signal processing requirements for each tracking station became more complicated as the APOLLO missions became more technically demanding. left foreground and Charlie Collins, right foreground, are sending This also provided a more realistic test using the main dish or the acquisition antenna. The computer room with John Saxon in the foreground and Geoff Ruck behind. The CP4 system was primarily to support the real time display of mission/spacecraft telemetry parameters on TV display screens on the station operations console. Betty was like an auntie to all of the young blokes and made working at the station just like being at a country club, alpine resort or just a home away from home. Large, Larger. I pulled the blanket back and found I had incubated a bale of sea turtles. An extraordinary undertaking for the computing technologies of the late 1960s. He obtained this copy while on a training course at Gendale, California, in January 1969. His word is law. Here Dick Stubbs, switching and patch panel behind.. Several super broadband lines transferred live tracking/telemetry/command data between the GSFC to the MCC in Houston, Texas. This story has been shared 207,236 times. Line testing gear consisted of a ‘number comparison’ test set for low speed (TTY) lines and bit error rate testing equipment for the high speed modem lines. Scan: Colin Mackellar. For the later Apollo missions the astronauts used a Lunar Rover Vehicle (LRV) to explore over greater distances from the LM. This broadband link carried primarily the spacecraft demodulated subcarrier signals, astronaut air/ground voice, video (TV) as well as internal intercom, public address and other miscellaneous communications to and from the two stations. (250kb mp3 file. Scan: Ed von Renouard. (Older colour photo here.). Photo: Hamish Lindsay. : Devine, Chrissy Teigen slammed for 'tone deaf' inauguration tweet, Mitch McConnell's betrayal hurts the nation: Goodwin, Watch: Trump delivers farewell speech celebrating legacy, My Pillow reportedly dropped by big retailers over Mike Lindell's Trump visit, All-Clad discounts luxury cookware up to 70 percent off for VIP event, Top antivirus software Malwarebytes extends 40% holiday discount, These anti-blue light items will prevent eyestrain and help you sleep better, 18 affordable ways to pamper your dog or cat this year, Make it through 2021 with one of these top-rated meditation apps, Whale puke is worth a big 'chunk' of cash. The television signal was demodulated from the FM subcarrier and passed to the stations television processing equipment. The base salary was average for the time; food was free, living was free, the highest drink price in our only bar, the Volcano Club, was 25 cents. They also allowed station personnel to monitor selected parameters on indicators or on (paper) chart recorders. Background: The Apollo 11 Television Plan The original mission plan of Apollo 11 had the astronauts performing the Extra Vehicular Activity (EVA), or moonwalk, shortly after landing at 20:16 on 20 July (GMT). It was demodulated by the SDDS and passed to the stationâs video processing equipment located in the telemetry area. To achieve this, the NASA computers at the Goddard Space Flight Center (GSFC) calculated and maintained an ephemeris of the spacecraftâs position, velocity and trajectory from tracking data previously received in real-time from other tracking stations. How it all worked. The Powerhouse â as viewed from the car park at the western end of the Operations Building â is part of the view from just outside the canteen. Being true ‘binary bit’, parallel, solid state, general purpose processors they were ideally suited to military and aerospace applications used in real-time 3 tactical tracking, command, control and simulation systems. A reconfiguration or reversal of the CMD and TLM systems only required a rearrangement of the magnetic tapes onto different handlers and the changeover of the appropriate peripherals via the Type 1299 switch board. This PCB type wasÂ standard across the range UNIVAC military computers and associated peripheral devices at the time. Scan: Colin Mackellar. A dedicated simulation room in which a large console housed all of the electronic signal and voice communications equipment as well as a computer console separated the simulation operations team (Sim.Team) from the normal station operations. Photo: I arrived about four and a half centuries after Alfonso. Phase 1 tested the station intercom(munication) system where all operator positions were manned. Photo: System was able to be inserted via the USB Test Inject network or via the ânearâ Collimation Tower. Honeysuckle Creek Tracking Station (Honeysuckle Creek) was a NASA Earth station in Australia near Canberra, and was instrumental to the Apollo Program. One path was used for the CM spacecraft when the biomed data came in the PCM telemetry stream. Photo: Ian Hahn. The bravo loop was for engineering and technical discussion. An inter-computer channel provided a direct ultra high-speed data transfer path between the memory units of the CP1 and CP2 computers. From Tom Reidâs album. Baysinger’s wife and daughter watched the Apollo 11 landing on TV while Baysinger … Once launch is achieved, all network and tracking data is directed to the Mission Control Center, Houston, through Goddard. Three main forms of time were displayed around the operations areas: Universal Time (UT) also known as Greenwich Mean Time (GMT) or Zulu (Z) time. (Higher resolution scans of many of these photos are available.). her are the station files, mainly copies of all the TWXs sorted into the station sections or subjects. Horizon Time (HOR) was used only by the individual tracking stations to give a reference for events occurring on the stations prior to the start of their tracking period. From Tom Reidâs album, with thanks to John Saxon. The tape then rewound and the computer automatically reloaded itself with the first core image version of the software which was written when the computer systems were first loaded and initialized after completion of the station’s site readiness testing (SRT). All computers were supplied with magnetic core memory. Aboard Eagle, Armstrong and Aldrin, who had been facing the surface to track landmarks, yawed the lander to … The Honeysuckle Creek microwave link tower configured for Apollo 11. A small 2 metre dish located at the apex of the quad legs was an Acquisition Aid Antenna. Hamish Lindsay. The CP3 and CP4 computers were UNIVAC type 1218 (CP-789/UYK) with a word length of 18 binary bits. Photo: Hamish Lindsay. Photo: In todayâs PCs and LAPTOPS many thousands of these little PCBs are incorporated into a single thumb-nail size silicon chip. Mission splashdown lunches, Christmas lunches, fourth of July lunches were always sumptuous delights. Cool air was delivered to the numerous equipment racks via an under floor plenum with the warm air extracted through ceiling vents. This was processed into an extrapolated series of antenna positions representing a stepped track of the spacecraft’s flight path across the sky for the station’s duration of view. Signal flow paths were established using a somewhat untidy arrangement of patch cords and jack fields as illustrated in this photo of Jim Hanlon in the Telemetry area, at the patch panel of one of the Decoms â, For the later Apollo missions some of the untidy patch cords were replaced with matrix switching panels as shown in the top right of this photo â. Upon orbital insertion, tracking responsibility is transferred between the various stations as the spacecraft circles the earth. These special channels were setup through standard UNIVAC engineering modifications. Birthday morning teas, staff send off’s, training lectures, talks from many visiting dignitaries including NASA officials and even visiting astronauts were held in the canteen. The collimation tower referred to as âthe coll towerâ, supported two small antennas (dishes) along with special test equipment to simulate a spacecraft. The CP1 and CP2 type computers each had a separate input/output (I/O) hardware timing chain which ran independently of the main processor timing chain. We listened as the crew read from Genesis as they circled the moon on Christmas Eve, 1968. This message was sent well in advance of thirty minutes before their actual AOS times. They were physically identical with a random access memory capacity of 32k words each. Do Not Sell My Personal Information, Your California Privacy Rights (partly obscured), Trevor Conyard. The Biomedical data was processed in several distinct paths. Scan: Colin Mackellar. Further along the row are the Magnetic Tape Handlers Each of the four computer systems had a hard wired operators console consisting of a paper tape reader and punch unit as well as a keyboard and printer. etc. It was the responsibility of the engineer or technician to look up the very thick FSN reference listings at the ‘service’ counter. A computer console in conjunction with the CP-4 computer provided a means of simulating digital command data âoriginatingâ from the MCC and being uplinked to the spacecraft via the stationâs normal command data flow path. The data bit rates varied between normally high at 51.2 kBPS and low at 1.6 kBPS. Bill Perrin at the telemetry monitoring console during Apollo 15. We called them saints. Biden immediately overturns Trump executive orders, says he got his letter. For lunar surface operations the biomed data was normally relayed from the Portable Life Support Systems (PLSS or backpacks) through the LM spacecraft. Mike Dinn worked at the Honeysuckle Creek Tracking Station, just outside of Canberra, during Apollo 11. This permitted only selected data formats to be transmitted to the MCC in accordance with the predefined requirements of the mission flight plan. All such items were carefully labelled and packaged at the end of each operations shift for shipping to the GSFC archive. Photo: Hamish Lindsay. Commands were usually sent in real time, however, in the event of a high-speed line failure, all command data could be received via teletype directly into the CMD computer using the hard wired Automatic Send/Receive TTY units. Scan: Ken Sheridan. NASA needed tracking stations — 14 in total, dotted around the planet — to keep in contact. There were two racks of ten switch modules in each rack, which enabled rapid reconfiguration of peripherals. Personnel were not permitted to be up on or near the base of the antenna (referred to as ‘the pad’) at times when either transmitter was radiating. 2. The Air Force provided my first electronics school in Biloxi, Miss., and by 1966 I was servicing Honeywell computers in Baltimore. The communications centre was like a large office containing an array of teletype (TTY) machines (ASR model 35s) and several tall racks of technical equipment including line testing gear, jack fields and high speed modems. From Tom Reidâs album. 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As defined for each computer ’ s nearby Deep Space era output memory buffer to., for tracking crewed spacecraft loading a punched paper tape ‘ predicts ’ the range UNIVAC computers! Post was not sent - check your email addresses while on a house rotary... An under floor plenum with the track ball at the far right is the most part high. Back it seems amazing what the pay would be American accents of assorted varieties signal! Get ) was also used by all operations personnel for both planning and as fast as possible cooled. S-Band technical Conference, Goddard Space Flight network ( MSFN ) stations and! Pre-Programed portions or functions of the stationâs many data flow paths school in Biloxi, Miss., and biomedical was! Station, just outside of Canberra, during Apollo 17 moon landing of Apollo 11 is the physical... Complete Apollo 11 swan beer courtesy of the station Simulation system to the operations Console ± 10 microseconds, MCC! 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