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Remote sensing problems to solve

 There are tens of satellites in orbit as well as aircraft that take remotely sensedimages of the earth. On a given day, thousands of images are taken of a particulararea but only some can be used to study a specic problem. The type of imageryused depends on the four resolutions (spatial, spectral, temporal and radiometric).

No remote sensing sensor has the optimal of all the resolutions because of the costof designing the instrument and the data transfer rate from the satellite to theground. The resolutions need to be traded o in order to get the imagery you want.

!patial "esolution # $hat is the pi%el si&e'!pectral "esolution # $hat wavelengths does the sensor observe and how manybands'

 Temporal "esolution # ow often does the sensor take an image or a given location'"adiometric "esolution # ow many grayscales does each band have'

*t is your +ob to design a research study to research the issues below. ierent typesof imagery and spatial resolutions need to be used to address each of the problems

based on the four resolutions. iscuss why you chose the sensor that you did and,in your analysis, show how the four resolutions apply to the problem. -e sure toinclude the type of imagery as well as its characteristics of the sensor spatialresolution, repeat time, spectral bands and radiometric precision. /inally, calculatethe si&e of the image given the spectral bands used, number of images andradiometric resolution.

0nvironmental 1roblems to !tudyarmful algal bloom in 2rand 3ake !t. 4ary5s4elting of the polar ice cap # tracking the annual cycle of ice in the 6rctic Ocean

 Tracking and prediction of urricane 7oachin/looding in Toledo, i.e. develop a new 8ood map using a high resolution 04 (digitalelevation model)$ild res in 9alifornia :;

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4odis

Spatial Resolution

250 m (bands 1–2) 500 m (bands 3–7)1000m (bands 8–36)

4O*! bands , and ? can clearly identify the distribution of the bloom in the -ayby its conspicuous bright color

Harmful algal blooms (HABs)

4ultispectral 4O*! data from the N6!6 Terra and 6@ua satellites is now availableat full resolution, at no cost and in almost real time. owever, most 6-s occur incoastal &ones and have scales that are too small for the typical < km pi%el si&e ofocean color sensors. 4oreover, standard products from ocean color sensors eitherdo not work at all or are highly inaccurate in coastal &ones in typical 6- conditions

1 250m 0.620-0.670 Land-co!r class"f"ca#"on$ cloro%&'ll

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rctic sea 'ce