A Study on Medium Earth Orbit Utilization

Study of Ionospheric Effects on Azimuth Imaging for Medium-earth-orbit Sar

The Medium-Earth-Orbit SAR (MEOSAR) is one of the most potential next-generation spaceborne SARs for its excellent performances. However, the MEOSAR may not be able to produce data useful for science applications due to ionospheric effects. So it is very necessary to study ionospheric effects for the development of MEOSAR. In this paper, we present ionospheric effects on azimuth imaging for MEO...

Dilution of Disposal Orbit Collision Risk for the Medium Earth Orbit Constellations

Unclassified Spacelift: Suborbital, Earth to Orbit and On- Orbit

A vision for the future: In 2020, aerospace forces will be a reality. A notional composite aerospace wing, based in the continental United States (CONUS), would include a squadron of rocket-powered transatmospheric vehicles (TAV). These Black Horse vehicles, derived from the Question Mark 2 X-vehicle shown in figure 1 and described later in this paper, will be fighter-sized airframes capable of...

a study on construction of iranian life tables: the case study of modified brass logit system

چکیده ندارد.

Higher order nonlinear chirp scaling algorithm for medium Earth orbit synthetic aperture radar

Due to the larger orbital arc and longer synthetic aperture time in medium Earth orbit (MEO) synthetic aperture radar (SAR), it is difficult for conventional SAR imaging algorithms to achieve a good imaging result. An improved higher order nonlinear chirp scaling (NLCS) algorithm is presented for MEO SAR imaging. First, the point target spectrum of the modified equivalent squint range model-bas...