CCAM is done via pryo valves in Ozidizer tank (in location mast umbilicals are connected and filled and drained) followed by pressure blow down on all remaining tanks. operation is similar to Ariane 5 first stage at sep.
According to N2YO, Progress-59 will overfly Cape Canaveral in a few minutes. Are there any assets there that could help assess the situation?
Apparently in that press briefing Roscosmos chief Komarov reported that the (main?) engine of Progress had depressurized (!), and that telemetry from the spacecraft ceased 1.5 seconds before S/C separation from rocket third stage. He said that because of that docking to ISS is impossible and controlled de-orbit is under consideration.Damn! Source: http://tass.ru/kosmos/1941163
How are they going to do a controlled de-orbit if they can't communicate with it?
How exactly did TsUP get the solar panel deployed signal if telemetry ceased before spacecraft separation?
Quote from: Star One on 04/29/2015 02:50 pmHow are they going to do a controlled de-orbit if they can't communicate with it?And how are they going to do a controlled de-orbit with a depressurized main engine? Thrusters?
Apparently in that press briefing Roscosmos chief Komarov reported that the (main?) engine of Progress had depressurized (!),
Can someone translate this piece of Russian on NK? Seems to be something about losing telemetry from the Soyuz 3rd stage in the final 3 seconds of ascent? Quote from: http://novosti-kosmonavtiki.ru/forum/messages/forum10/topic14472/message1368649/Вот, а это уже информация, спасибо.
Вот, а это уже информация, спасибо.
That said, a failure of telemetry on Progress before S/C sep is highly unlikely given that videos from the KURS camera have been received since then. I think that they meant a loss of telemetry from the Soyuz third stage. At least I hope that this is what they meant as it sounds more plausible. I do hope that they aren't going to start down the 'those videos and those telemetry don't exist; they never existed' route.
why must it imply an INTERNAL energetic event (internal to the 3rd stage + PROGRESS system)? Why couldn't it have been an impact with a SINGLE piece of pre-existing space debris? Something either small enough, or large and made of some material transparent to the space radar frequency. This is pretty plausible, given that the same parking orbit is extensively used. The culprit could've been something discarded from a previous Soyuz/Progress mission. It could've been one piece impacting, and then creating 44 additional pieces of shrapnel?
First NORAD TLEs of the "debris" from this incident has just come in - 14 of them. Catalog number #40621-40634/2015-024C-R.
The third stage flight went fully nominal. But 1.5 seconds before spacecraft separation the telemetry was lost from BOTH 3d stage and spacecraft.We used a backup channel to regain some telemetry from spacecraft (no more telemetry from 3d stage). Many spacecraft systems function off-nominaly. We have lost pressure in fuel lines leading to main engine.
Regarding 40 (14?) debris objects: at least some of them (possibly all) are separation devices covers/shafts, not debris.
We believe a problem occurred during third stage separation. We have opened an emergency and investigative team to determine what occurred and fix it. We are planning to press ahead with another launch on May 26th, but this launch will use a different rocket (soyuz 2)
Quote from: hrissan on 04/29/2015 03:43 pmRegarding 40 (14?) debris objects: at least some of them (possibly all) are separation devices covers/shafts, not debris.Well, NORAD never tracked such things from previous launches (usually only 2 objects would appear), so.....
Revisit the hazard of uncontrolled reentry -- This reentry will be different, the Progress will have tanks practically full of propellant and water, which over the next few days can be expected to freeze. That ought to significantly enhance survivability through boil-off cooling at high temperatures, allowing large quantities of hypergolic propellants to reach the surface in a localized area. Is this a USA-183-type event headed our way?...and you may quote me.