Effect of atmospheric drag on rocket launches and benefits of high ...
$\begingroup$ There are many considerations more significant than air drag. Logistics of delivering parts by railway, working conditions for the employees, safe buffer zone around the launchpad, proximity to Equator for "orbital speed" kickstart (that extra 1700km/h added to orbital speed at the equator versus zero for near-polar launches!) - it may be more profitable to launch 300km further ...
What is the ISS drag? - Space Exploration Stack Exchange
2015年11月9日 · First of all, let's figure out what the drag actually is. For that, Heavens-above has a nice chart. Of some note is the fact that the atmospheric drag rate changes over time, most notably with the solar cycle, but it can change for a variety of reasons, especially for a body as dynamic as the ISS. With the current altitude ranging around 400.
Orbital propagation: atmospheric drag - Space Exploration Stack …
Now, I'm trying to implement the atmospheric drag. I've found the equation from Vallado: ad = −1 2ρCdA ms |vrel|vrel a d = − 1 2 ρ C d A m s | v r e l | v r e l. I'm thinking in this way: transform the frame from ECI to ECEF. The velocity in ECEF will be vrel v r e l. Get the density using any model (Jaccia-Roberts, etc) and calculate.
orbit - At what altitude do the effects of atmospheric drag …
The effect of various perturbations a s a function of geocentric satellite distance is illustrated in Figure 3.1. For the calculation of the influence of atmospheric drag on circular low-Earth satellite orbits, exospheric temperatures between 500K and 2000K (cf. Sect. 3.5) have been assumed.
Where can I find data for Atmospheric density vs. altitude?
This sits occasionally gets questions about e.g. drag on a satellite, and I've never found a good source, just rules of thumb (drag is significant in LEO, but not an issue in GEO). I realize atmospheric density fluctuates, I'd be happy with an average value or even better, a bandwidth indication (max. and min. values).
Delta-v from atmospheric drag - Space Exploration Stack Exchange
2014年5月5日 · Sorted by: The retrograde delta-v that the spacecraft will receive from atmospheric drag depends on two things: the mass of the spacecraft and the force of drag. (And the drag force will be integrated over the all of the time that the spacecraft is in the atmosphere.) The drag force, in turn, depends on four things: The velocity of the spacecraft.
orbital mechanics - What causes a satellite's orbit to decay?
2023年3月29日 · The Wikipedia article on orbital decay lists a number of reasons, in addition to atmospheric drag: Tidal effects. An orbit can also decay by negative tidal acceleration when the orbiting body is large enough to raise a significant tidal bulge on the body it is orbiting and is either in a retrograde orbit or is below the synchronous orbit.
How hard does atmospheric drag push on the ISS? Is it more than …
2021年3月14日 · The ISS is about 400,000 kg and so I'm guessing that the drag force must be quite substantial to make a dent in its velocity, even over months." From Litho's other answer, that drag force turns out not to be very substantial. What it doesn't address, is why bother adding this feature when the impact on drag is so small? $\endgroup$ –
Atmospheric drag effect - Space Exploration Stack Exchange
Using a simple drag equation for A A = 10 m^2 and CD C D = 1, plugging that force into. FD = 1 2ρv2CDA F D = 1 2 ρ v 2 C D A. and solving for ρ ρ gives 2.5E-12 kg/m^3. Looking that up in this answer or the reference there gives an altitude of only 450 …
Effects of atmospheric conditions on rocket performance?
Drag would be decreased a little. A higher atmospheric pressure would have reverse effects. These effects will be quite small. For most launchers, the total effect of atmospheric drag is on the order of 1% of the velocity budget to orbit; weather effects will change that only a small amount. Rocket performance is always slightly variable, and ...