Tca: Fill & Download for Free

Nothing stops space junk. We move the ISS out of the way to prevent the collision.USSTRATCOM monitors low Earth orbit pretty carefully. Each object they track is propagated into the future to determine if it poses a threat to the ISS. They draw a large box around the ISS and if any object has a greater than 1 in 100,000 chance of entering that box they issue a yellow conjunction notice. If any object has a greater than 1 in 10,000 chance of entering the box they issue a red conjunction.These conjunction notices are sent to TOPO (Trajectory Operations Officer). TOPO is one of the flight controllers in the Mission Control Center in Texas. TOPO will analyze the conjunction information and if the threat is deemed significant will discuss with Russian Ballistics (a specialist at the Moscow Control Center) whether or not a DAM (Debris Avoidance Maneuver) should be executed.Nominally, this decision happens about 30 hours before the TCA (Time of Closest Approach). 23.5 hours before the TCA, the decision will be made about the DAM and planning for it will commence, with the intent of performing the maneuver two hours before the TCA.The DAM is essentially the same type of maneuver performed to periodically reboost the station, but smaller. A small burn in either the prograde or retrograde direction is done to either increase or decrease (respectively) the velocity of the ISS, resulting in a small change in altitude so that at the TCA, the ISS will no longer be at the location of the object of concern.Sometimes the decision will be to not perform the maneuver. There are various reasons for this, including that the maneuver might actually introduce risk of collision with another object. Sometimes there just isn't confidence in the projections. If the decision is made to not perform an avoidance maneuver, the crew will be told to shelter in their Soyuz at the TCA.So, all of this depends on the object being tracked well in advance. A meteor that just comes out of nowhere isn't likely to be tracked or propagated so well.

That kind of depends on how you interpret the word "dodge".USSTRATCOM monitors low Earth orbit pretty carefully. Each object they track is propagated into the future to determine if it poses a threat to the ISS. They draw a large box around the ISS and if any object has a greater than 1 in 100,000 chance of entering that box they issue a yellow conjunction notice. If any object has a greater than 1 in 10,000 chance of entering the box they issue a red conjunction.These conjunction notices are sent to TOPO (Trajectory Operations Officer). TOPO is one of the flight controllers in the Mission Control Center in Texas. TOPO will analyze the conjunction information and if the threat is deemed significant will discuss with Russian Ballistics (a specialist at the Moscow Control Center) whether or not a DAM (Debris Avoidance Maneuver) should be executed.Nominally, this decision happens about 30 hours before the TCA (Time of Closest Approach). 23.5 hours before the TCA, the decision will be made about the DAM and planning for it will commence, with the intent of performing the maneuver two hours before the TCA.The DAM is essentially the same type of maneuver performed to periodically reboost the station, but smaller. A small burn in either the prograde or retrograde direction is done to either increase or decrease (respectively) the velocity of the ISS, resulting in a small change in altitude so that at the TCA, the ISS will no longer be at the location of the object of concern.Sometimes the decision will be to not perform the maneuver. There are various reasons for this, including that the maneuver might actually introduce risk of collision with another object. Sometimes there just isn't confidence in the projections. If the decision is made to not perform an avoidance maneuver, the crew will be told to shelter in their Soyuz at the TCA.So, all of this depends on the object being tracked well in advance. A meteor that just comes out of nowhere isn't likely to be tracked or propagated so well.

It doesn’t work that way.Space debris isn’t something that you see. If you can see it, it’s in a very similar orbit and moving at a low relative speed. That is not a likely occurrence. We wouldn’t put the ISS in the same orbit as another object. The threat of space debris is when it it is a different but intersecting orbit. When that happens, the relative velocities are very high. Expecting to see space debris, in that scenario, would be like expecting to see a bullet when someone shoots at you - that’s putting it mildly. Orbit velocity in low Earth orbit is ten times the speed of a bullet.The ISS is not something that is maneuvered on a dime. Maneuvers require analysis. They are expensive and complicated and if done incorrectly can increase the risk to the ISS and affect the launch plans of the next few visiting vehicles.USSTRATCOM monitors low Earth orbit pretty carefully. Each object they track is propagated into the future to determine if it poses a threat to the ISS. They draw a large box around the ISS and if any object has a greater than 1 in 100,000 chance of entering that box they issue a yellow conjunction notice. If any object has a greater than 1 in 10,000 chance of entering the box they issue a red conjunction.These conjunction notices are sent to TOPO (Trajectory Operations Officer). TOPO is one of the flight controllers in the Mission Control Center in Texas. TOPO will analyze the conjunction information and if the threat is deemed significant will discuss with Russian Ballistics (a specialist at the Moscow Control Center) whether or not a DAM (Debris Avoidance Maneuver) should be executed.Nominally, this decision happens about 30 hours before the TCA (Time of Closest Approach). 23.5 hours before the TCA, the decision will be made about the DAM and planning for it will commence, with the intent of performing the maneuver two hours before the TCA.The DAM is essentially the same type of maneuver performed to periodically reboost the station, but smaller. A small burn in either the prograde or retrograde direction is done to either increase or decrease (respectively) the velocity of the ISS, resulting in a small change in altitude so that at the TCA, the ISS will no longer be at the location of the object of concern.