Sentences with phrase «orbital decay»

"Orbital decay" refers to the gradual decrease in the altitude or height of an object orbiting around a larger celestial body, usually due to factors like atmospheric drag or gravitational forces. This decay leads to the object's orbit getting smaller over time until it eventually falls back to the planet's surface or burns up in the atmosphere. Full definition
Examples of these kinds of errors being responsible for a climate model / observation discrepancy range from the omission of orbital decay effects in producing the UAH MSU data sets, or the problems of no - modern analogs in the CLIMAP reconstruction of ice age ocean temperatures.
Wentz and Schabel 1998 found that UAH didn't account for orbital decay of the satellites, which resulted in a spurious cooling trend.
Such an assessment should involve a detailed analysis of the sensitivity of global - mean temperatures derived from these three different measurement systems to the various choices made in the processing of the raw data — e.g., corrections for instrument changes, adjustments for orbital decay effects in the satellite measurements, and procedures for interpolating station data onto grids.
They are eventually eliminated by orbital decay and accretion by the Sun, collisions with the inner planets, or by being ejected from the solar system by near misses with the planets.
On April 30, if all goes well, after running out of fuel to fight off orbital decay NASA's long - running MESSENGER spacecraft will end its mission to Mercury by crashing into the planet's surface at nearly 4 kilometers per second.
But only the lucky binaries seem to have planets that orbit them; some stellar binaries that lack orbiting bodies have a different third party — a distant star that's so massive, its gravitational fluxes actually change the orbit of the stellar binary, causing the two stars to shrink together in a process called orbital decay.
One researcher explained how the interaction between the ionosphere and another layer in the atmosphere, the thermosphere, counteract heating in the thermosphere — heating that leads to expansion of the upper atmosphere, which can cause premature orbital decay.
Emission of gravitational radiation was inferred from the measured orbital decay of a single binary pulsar some 30 years ago.
RSS pointed out a significant error in UAH's temperature analysis caused by a failure to accurately correct for the effects of orbital decay on observations across multiple satellites.
Given that the radiation reaches the satellite sensors having travelled through a warming lower atmosphere and cooling stratosphere, that bias exists between the various sensors, issues with orbital decay, and a host of other obstacles, there's a lot of careful and painstaking analysis required, and much that can go wrong.
AQUA has a self - correcting propulsion system, so the UAH annual cycle, and the cyclic component of UAH - RSS divergence, can not be the result of differing methods of correction for diurnal drift resulting from orbital decay.
A high value of Q, say 107, means that only 1 part in 107 of the energy is dissipated, giving a low rate of orbital decay.
With less air «up there» to cause orbital decay, space junk accumulates around our planet.
While the satellites are designed to fly over the same spot on the Earth at the same time every day — a precondition to accurately estimating changes in temperatures over time — this orbital decay causes their flyover time to change.
TrES - 3 has one of the shortest orbital periods of the known transiting exoplanets, facilitating studies of orbital decay and mass loss due to evaporation, and making it an excellent target for future studies of infrared emission and reflected starlight.
Each satellite has had different calibration problems (due to orbital decay, sensor issues etc.) and stringing them together has been fraught with difficulty.
Satellites are vulnerable to sampling biases and orbital decay, which affect the consistency of measurements and the long term maintenance of the temperature record they produce.
What's less - well known is that satellite data require analagous procedures to account for orbital decay, instrument degradation over time, and possible calibration errors.
The combined adjustments for orbital decay and diurnal drift dramatically change the trend vis - a-vis the prior method.
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