GUVI Biblio


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Found 5 entries in the Bibliography.

Showing entries from 1 through 5


Vertical Thermospheric Density Profiles From EUV Solar Occultations Made by PROBA2 LYRA for Solar Cycle 24

A new data set of summed neutral N2 and O number density profiles, spanning altitudes between 150 and 400\ km, and observed during Northern Winter from 2010 to 2016 is presented. The neutral density profiles are derived from solar occultation measurements made by the 0.1\textendash20\ nm Zr channel on the Large Yield Radiometer (LYRA) instrument on board Project for Onboard Autonomy 2 (PROBA2). The climatology derived from the vertical profiles is consistent with that predicted by the NRLMSISE-00 mode ...

Thiemann, E.; Dominique, M.; Pilinski, M.; Eparvier, F.;

Published by: Space Weather      Published on: 12/2017

YEAR: 2017     DOI: 10.1002/2017SW001719


Seasonal variability in global eddy diffusion and the effect on neutral density

We describe a method for making single-satellite estimates of the seasonal variability in global-average eddy diffusion coefficients. Eddy diffusion values as a function of time were estimated from residuals of neutral density measurements made by the Challenging Minisatellite Payload (CHAMP) and simulations made using the thermosphere-ionosphere-mesosphere electrodynamics global circulation model (TIME-GCM). The eddy diffusion coefficient results are quantitatively consistent with previous estimates based on satellite dr ...

Pilinski, M.; Crowley, G.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 04/2015

YEAR: 2015     DOI: 10.1002/2015JA021084

annual; eddy diffusion; neutral density; satellite drag; seasonal variability; semiannual


Aerodynamic Analysis Based on Challenging Minisatellite Payload Satellite Lift-to-Drag Measurements

A lift-to-drag ratio analysis is performed based on accelerometer measurements made by the Challenging Minisatellite Payload satellite to investigate the nature of gas-surface interactions taking place in orbit. The results described are for the November\ 2002 satellite yaw maneuver. At this time, the satellite flew at a mean altitude of 407\ km. Two types of gas\textendashsurface interaction are considered in the analysis. The first is a cosine (fully diffuse) reflection model with incomplete energy acc ...

Pilinski, Marcin; Argrow, Brian;

Published by: Journal of Spacecraft and Rockets      Published on: 11/2013

YEAR: 2013     DOI: 10.2514/1.A32394

Semi-Empirical Satellite Accommodation Model for Spherical and Randomly Tumbling Objects

Orbits of launch-vehicle upper stages and spheres were observed by U.S. Air Force Space Command, and the resulting observations were converted by the Space Analysis Office to fitted ballistic coefficients by comparing the observed orbit with an orbit predicted by an atmospheric-drag model. The ballistic coefficients contain signals that result from atmospheric variability not captured by the model as well as signals that correspond to changes in the satellite-drag coefficient. For objects in highly elliptical orbits with ...

Pilinski, Marcin; Argrow, Brian; Palo, Scott; Bowman, Bruce;

Published by: Journal of Spacecraft and Rockets      Published on: 05/2013

YEAR: 2013     DOI: 10.2514/1.A32348


The impact of helium on thermosphere mass density response to geomagnetic activity during the recent solar minimum

Thayer, J.; Liu, X.; Lei, J.; Pilinski, M.; Burns, A.;

Published by: Journal of Geophysical Research      Published on: Jan-01-2012

YEAR: 2012     DOI: 10.1029/2012JA017832