-Polar Bear--I seem to remember that this was a Transit satellite that was donated to the Smithsonian and was on display for many years. Eventually the Navy asked for it back and converted it to the Polar Bear research satellite.
What about the Spares from the LEO com constellations back in the 1990's.
As there is currently some movement, to launch the DSCOVR (Triana) satellite, which has been in storage for many years, i am looking for other satellites, which have been built, (mostly) completed and have not been launched.
Going this way, there was also a Viking 3, a Voyager 3, and a Pioneer H (not Pioneer 12!).
Going this way, there was also a Viking 3, a Voyager 3, and a Pioneer H (not Pioneer 12!). Oh, and a Lunar Orbiter 6, and a third Lunokhod (Luna 25).
Quote from: Archibald on 05/12/2011 06:48 pmGoing this way, there was also a Viking 3, a Voyager 3, and a Pioneer H (not Pioneer 12!). Were these actual flight hardware backups? Or were they ground engineering test models? By Viking I assumed that the spacecraft had become so expensive that they no longer built backups like they had earlier.
Re Pioneer H, I recall reading that four of the Pioneer F-type (later Pioneer 10) craft were built and tested. All of the best-performing components were then re-assembled as Pioneer F and the second-best-performing ones as Pioneer G. Was Pioneer H built from the third-best performing components?
DOS were ordered in pairs. 121 (Salyut) and 122, 123 (Kosmos 557) and 124 (Salyut 4), but then following 125 (Salyut 6) was 125-2 (Salyut 7). 127 (Mir) and 128, which was modified to Zvezda. So did 125 have a sibling, 126?
Quote from: Stan Black on 06/22/2011 03:17 pm DOS were ordered in pairs. 121 (Salyut) and 122, 123 (Kosmos 557) and 124 (Salyut 4), but then following 125 (Salyut 6) was 125-2 (Salyut 7). 127 (Mir) and 128, which was modified to Zvezda. So did 125 have a sibling, 126?The reports were that Salyut 7 was the backup for Salyut 6, and was virtually identical. Why there is a missing 126 is a mystery. Perhaps 125-2 was the same as 126.
- installation of electric stoves for heating food;- installation of a refrigerator;- hot water was made available at all times;- the chairs at the central command post were replaced by portable seats;- the BST-1M telescope was replaced by a group of X-Ray telescopes similar to the Salyut-4 group;- two of the portholes would now let in ultraviolet rays (one was in the work compartment and the other in the transfer section);- portholes could now be closed by removable transparent covers;- a large porthole for making astronomic and visual observations was made especially for the transfer compartment;- the docking system was improved so that heavier vehicles could be accommodated.
I know several Iridium were not launched before the original company went under, along with several other bits they were working on. I don't know if the reborn Iridium launched them or not.
Quote from: Downix on 06/26/2011 06:35 pmI know several Iridium were not launched before the original company went under, along with several other bits they were working on. I don't know if the reborn Iridium launched them or not.They'd probably have to update the electronics to support higher data rates for it to be worth while.
Whatever happened to the DSCS III comsat that was irradiated as part of the Huron King test? It was placed in a vacuum chamber above a nuclear blast, and then pulled out of the way before the ground sank into a crater:http://en.wikipedia.org/wiki/File:Huron_King_test_chamber.jpghttp://nuclearweaponarchive.org/Usa/Tests/Nts.html
There was a fair amount of Apollo hardware that was built but never launched.The skylab rescue vehicle CSM 119 was built but never launched it was used as a backup during ATSP.Later it was studied during the design of Orion.
Quote from: Patchouli on 06/26/2011 06:26 pmThere was a fair amount of Apollo hardware that was built but never launched.The skylab rescue vehicle CSM 119 was built but never launched it was used as a backup during ATSP.Later it was studied during the design of Orion.CSM-119! My favorite! How to make do with what you have to get what you need. Five seats in an Apollo. Check out the image at left. And how could anyone forget Skylab 2?
Dumb question, I have only seen the second manned Skylab mission referred to as Skylab 3, what sources refer to it as Skylab 2?
Телескоп 17В317 был создан ЛОМО исключительно для "Аракса-Н" (он же "Аркон-1" . Он имел одинаковый с "Сапфировским" 17В321 диаметр главного зеркала (1,5 метра), но несколько отличался по конструкции и фокусному расстоянию (28 метров против 20). Масса самого КА - 7,5 тонн. Насколько я помню, было изготовлено 3 телескопа. Два из них побывали в космосе в 1997 (11Ф664 №6420) и 2002 (11Ф664 №6421) годах, а запуску третьего (11Ф664 №6422) помешала "Персона". Что касается стенаний по поводу того, что в 90-х на Лавке никого не осталось, то они напрасны. К началу 90-х аппарат, включая математику, был уже разработан. Дальше остались вопросы с производством и испытаниями. Так что для запуска и даже для модернизации "Араксов" силы еще оставались. И еще. Если вы пытаетесь сравнить разрешение у "Араксов, и КН-11, то сравните высоту перицентров их орбит. Для тех, кому лень заглянуть хотя бы в Википедию, сообщаю, что высота Пц у КН никогда не превышала 400 км, а у "Араксов" не опускалась ниже 1500 км. Логично спросить, почему же "Аракс" не летал ниже? Да потому что ниже была заповедная территория, принадлежавшая Дмитрию Ильичу Козлову.
Probably several ICO satellites from the MEO constellation were more or less completed, but never launched.
I'm too lazy right now to look this up, but the Steven F. Udvar-Hazy Museum, part of the Smithsonian, near Dulles International Airport, recently got a Sirius/XM communications satellite. I saw this mentioned somewhere. Apparently it's a complete satellite that the company decided not to launch because they changed their constellation (probably because of the merger). That's a rather expensive piece of equipment to not use.