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REMOTESENSINGOFTHECRYOSPHERE:EXERCISES#1(LeighStearns)1. Glacieroutlines:Withoutconferringwithyourclassmates,markonthefollowingimageswhereyouwouldconsidertheglacieroutlinetobe:
A.
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B.
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C.
Now,compareyouroutlineswithothers.Howdotheydiffer?Wheredotheydiffer?Providesomereasonsforthedifferences.Whatadditionalinformationmightyouusetoimprovetheaccuracyofyourareaestimates?Howwouldquantifytheuncertaintyinaglacierareaestimate?
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2. ElectromagneticSpectrumBelowisaschematicoftheelectromagneticspectrum.Foreachofthecategoriesinthetable,describepossiblecryospheresatellitesandapplications(youshouldbeabletocomeupwith~3applicationsforeachwavelength).Underlineoneapplicationforeachwavelength;forthatapplication,describesomeadvantagesanddisadvantagesofusingthissensor.
Wavelength Satellite/Sensor Applications Advantages DisadvantagesVisible
ThermalInfrared
Microwave
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3. StructuralMappingThefollowingtwoimagesshowByrdGlacier,AntarcticapassingthroughtheTransantarcticMountainsandenteringthewesternmarginoftheRossIceShelf.Thefirstimage(a)isanopticalimageacquiredbyCanada’sRADARSATsatellite.Identifyandhighlightglaciologicalstructuresthatyoucanidentifyoneitherimage.Whatdifferencesareduetosensortype?A.
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B.
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4. FeaturetrackingforicevelocityPartoftheexperimentaldesignofaprojecttomeasureglaciervelocitiesbyfeaturetrackingrequireschoosingsatelliteimageryatanappropriatetimeinterval,givenasensor’sgroundrangeresolutionandtheexpectedicespeed.Completethefollowingtabletosuggestappropriatetimeintervalsindaysforarobustvelocityestimate,givendifferentrangeresolutionsandmaximumglaciervelocities. Groundrangeresolution(m)
Glaciervelocity(m/yr)
3m 15m 30m
50m/yr
300m/yr
2000m/yr