Article View: sci.misc
Article #1136Re: satellite pictures
From: Stuart Nixon
Date: Thu, 11 Jan 1990 13:05
Date: Thu, 11 Jan 1990 13:05
23 lines
1459 bytes
1459 bytes
In article <1523@castle.ed.ac.uk>, nick@lfcs.ed.ac.uk (Nick Rothwell) writes: > Recently I heard of satellite pictures that revealed buried ruins > in the Sahara desert. I have a simple question. Is this true ? > Can satellite pictures reveal buried ruins ? Has this > been done much ? The short answer is yes. Many of the commercial satellites (such as Landsat TM) have a thermal bands, e.g. sensors in the near or far infrared range (2.2 um to 10um). If you have an area with a fairly constant surface (such as desert), then sub-surface variations show up quite clearly. There has also been some research in thermal profile mapping, where the rate at which the surface heats up & cools down is used to guess at what material might be causing the effect (for example sandstone has a different thermal profile to granite). sns -- Stuart Nixon, sns@erm.oz.au Earth Resource Mapping, 130 Hay St, Subiaco, Western Australia 6008 Phone: +61 9 388 2900 Fax: +61 9 388 2901 E-mail: sns@erm.oz.au
Technical Details
Message-ID:
<556@erm.oz>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!umich!yale!cs.utexas.edu!samsung!munnari.oz.au!uniwa!erm!snsReferences:
<1523@castle.ed.ac.uk>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!umich!yale!cs.utexas.edu!samsung!munnari.oz.au!uniwa!erm!sns From: sns@erm.oz (Stuart Nixon) Newsgroups: sci.misc,comp.graphics Subject: Re: satellite pictures Summary: Yes, Thermatic images can pick up sub-surface details Message-ID: <556@erm.oz> Date: 11 Jan 90 13:05:20 GMT References: <1523@castle.ed.ac.uk> Organization: Earth Resource Mapping, Australia Lines: 23