uggs kopen Monitoring using NOAA-CHAIN 10a to rece

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Monitoring using NOAA-CHAIN 10a to recent changes in land cover in northwest China

thwestChinainAugust1990and1999ispre-processed. Inthisartictethedetai [processesofatmospherecorrectionandgeo-correction, andthecalculationofsystemparametersaredescribed. FhroughthestatisticsofvegetationindexNDVI, thechangeinlandcoverageisobtainedbetweenthesetwoperiods. Theresu [tsshowedthattheNDVIdecreases1nthewhoreNorthwestChina. andthevegetationdegenerationisserious. TheJuIvNDVIpeakdifferencels a 0.1439withadecrea-singareaof1.7710km2andanincreasingareaof0.4610km. TheAugustNDVIpeakdifferenceis a 0.1528withadecreasingareaof2.0110km 'andanincreasingareaof0.40210km!. Themostseriousdegradationareasaredistributedntheagriherdinter [eavingareasineasternQinghaiProvince, theTianshanMountainsandthelowerreachesoftheTarimRiverinXinjiangRegion. . Andthemoreseriousdegradationareasaredistrib-utedintheQaidamBasininQinghaiProvince,[link widoczny dla zalogowanych], theJunggarBasinandsouthernFarimBasininXinjiangRegion, thenorthemShaanx1Province, andtheMinqinCountyandQingyangPrefectureinGansuProvince. Atthesametime. theNDVIin-creasesinsomeareas,[link widoczny dla zalogowanych], suchas,[link widoczny dla zalogowanych], theIIiRiverBasininnorthernXinjiangProvince,[link widoczny dla zalogowanych], southernQinghaiProvince, IanzhouCityofGansuProvinceandtheQin [ingMountains. NOAA-CHAINisapre-processingdystemofNOAA-HRRdata. Astheresultofthepre-processing, theNDVIcanefficientlyshowthechangeinlandcoverageinNorthwestChina. A [sothesystemexhibitsaratherper-fectstability. ThekeystepsforNOAA-CHAlNaretheconfirmationandcatcutadonoftheparame-tersforatmospherecorrectionandthennmheroftheGCPsforgeocorrection. Keywords: changein [andcoverage; NorthwestChina; NOAA-CHAIN; pre ~ processing
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