By Ute Christina Herzfeld
Although it's in most cases understood that the Antarctic Ice Sheet performs a serious position within the altering international process, so far there's a normal loss of on hand details at the topic. The Atlas of Antarctica is the 1st atlas at the 7th continent to be released in two decades. It comprises one hundred forty five actual topographic and elevation maps derived from satellite tv for pc facts (GEOSAT and ERS-1 radar altimeter data), that are the easiest in their style on hand this present day. every one map is observed by way of an outline of geographic and glaciological features.
The introductory chapters familiarise the reader with the realm of the Antarctic Ice Sheet and its position within the worldwide process, in addition to discussing satellite tv for pc distant sensing and geo-statistical tools at textbook point. functions comprise precise nearby reviews of 15 outlet glaciers of the inland ice, a few of that are at the moment altering swiftly. mixtures with SAR facts facilitate the research of floor buildings and move features.
Despite its state of the art clinical accuracy, the Atlas of Antarctica is not just meant to be used by means of researchers and scholars in glaciology, geophysics, distant sensing, cartography and Antarctic examine, but additionally informative and relaxing for any reader attracted to the 7th continent. The Atlas is observed through a CD-ROM containing all of the atlas maps and elevation versions – permitting the reader to find a wealth of interesting info in Antarctica!
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Additional resources for Atlas of Antarctica: Topographic Maps from Geostatistical Analysis of Satellite Radar Altimeter Data
2-1) than in the Exact Repeat Mission (Fig. 1-2). Consequently, gaps between adjacent tracks are much smaller (only a few kilometers, with variable distance). For mapping larger areas, this is preferable. Changes in surface elevation can then be detected, if maps from two diﬀerent time intervals are compared. Depending on the “repeat” of the orbit, it takes several months to achieve complete coverage of the Earth (or, of any given large area within the limits of orbital coverage). S. Navy), but were later released.
1982), errors were at about 1 m in the early 1980’s (Schutz et al. 2-1). More information on orbit determination is given in Chelton et al. (2001, p. 64-86). Brieﬂy, orbit determination involves calculation of the satellite in motion, eﬀects of gravitational forces, geographically correlated errors, eﬀects of the geodetical reference frames used, forces of atmospheric drag and solar and terrestrial pressure. Precision satellite tracking systems are needed, examples of such systems are satellite laser ranging (SLR, used on all altimeter-carrying satellites except GEOSAT), DORIS (TOPEX/POSEIDON), PRARE (ERS-2), GPS (TOPEX/POSEIDON), TRANET/OPNET (SEASAT, GEOSAT), and TDRSS (TOPEX/POSEIDON).
Af - antenna footprint area. , an Antarctic ice surface. 3-1, where the following variables are introduced: θ - antenna pointing angle θ - incidence angle R -satellite altitude above nadir point 22 The radar equation (eqn. 2-3) characterizes the backscattered power from location dA as isotropically scattered by a sphere with cross-sectional Af - antenna footprint area area σ, hence σ is called radar cross section of the diﬀerential target area dA. In practice, backscattering is from a rough surface (not from spherical The normalized radar cross section.
Atlas of Antarctica: Topographic Maps from Geostatistical Analysis of Satellite Radar Altimeter Data by Ute Christina Herzfeld