By Ute Christina Herzfeld
Although it really is as a rule understood that the Antarctic Ice Sheet performs a serious function within the altering worldwide procedure, so far there's a basic loss of on hand details at the topic. The Atlas of Antarctica is the 1st atlas at the 7th continent to be released in twenty years. It includes a hundred forty five actual topographic and elevation maps derived from satellite tv for pc information (GEOSAT and ERS-1 radar altimeter data), that are the simplest in their type to be had at the present time. each one map is followed by way of an outline of geographic and glaciological features.
The introductory chapters familiarise the reader with the area of the Antarctic Ice Sheet and its position within the international process, in addition to discussing satellite tv for pc distant sensing and geo-statistical tools at textbook point. functions comprise targeted neighborhood reviews of 15 outlet glaciers of the inland ice, a few of that are presently altering speedily. mixtures with SAR info facilitate the examine of floor buildings and stream features.
Despite its state of the art medical accuracy, the Atlas of Antarctica isn't just meant to be used by way of researchers and scholars in glaciology, geophysics, distant sensing, cartography and Antarctic examine, but in addition informative and stress-free for any reader attracted to the 7th continent. The Atlas is followed via a CD-ROM containing all of the atlas maps and elevation types – permitting the reader to find a wealth of attention-grabbing information in Antarctica!
Read or Download Atlas of Antarctica: Topographic Maps from Geostatistical Analysis of Satellite Radar Altimeter Data PDF
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Extra info for Atlas of Antarctica: Topographic Maps from Geostatistical Analysis of Satellite Radar Altimeter Data
The process of retrieving the location of the point on the ground from which the satellite signal was returned is termed “retracking”. A series of waveform data is received, and speciﬁcs of the waveform yield the information on the reﬂected energy. Many eﬀects change the traveltime and the energy, thus the appearance of the waveform. The traveltime is aﬀected by atmospheric eﬀects (a wet atmosphere, for instance, is denser than a dry atmosphere, and the signal travels slower). Tides, caused by the gravitational eﬀect between 31 the moon and the Earth, as known for the oceans, also exist for the solid Earth.
4). Data processing for ERS-1 data and for GEOSAT data is similar (as far as the scope of this book is concerned), every new satellite does, of course, require a new set of correction algorithms, and it should not be assumed that a program written for the analysis of one data set might work for the next data set from a diﬀerent instrument as well. The ERS-1 altimeter is diﬀerent from the GEOSAT altimeter, but the GEOSAT altimeter is very close in design to the SEASAT altimeter, consequently each satellite has diﬀerent data and accuracy characteristics.
Computed using two-way travel time The range R t and speed of light c is ˆ = ct R 2 (refraction is neglected). 2 − 1) Taking corrections ΔRj , j = 1, . . g. atmospheric effects or scattering. Notice that all corrections are assumed to be positive (ΔRj > 0 for all j = 1, . . , n), consequently, the elevation would be overestimated without corrections. Determination of the ground location is termed “retracking” — there are many factors to consider in retracking, as we will see in the section on data processing later.