Glims aerial photos3/18/2023 Users worldwide at no charge, as a contribution to the Global Earth Observing System In 2009, NASA and METI of Japan released the first version of the ASTER GDEM to Table 4.3: ASTER scenes used for each of the study sites.įigure 4.1: Imaging geometry for ASTER along-track stereo (taken from Hirano et al. The resulting image stereo pair can then be used to generate Tilted 27.6° from the nadir telescope (3N), the backward pointing telescopeĪcquires an along-track nadir-matching image approximately 60 seconds after a given Through the use of a backward pointing telescope that acquires imagery in channel 3 In addition to multispectral imagery, the ASTER sensor also provides stereo coverage The horizontal accuracy of this product is estimated to be ~±50 m (Iwasaki, 2005 UTM coordinate system, WGS84 datum (Grid 44 South), and are listed in table 4.3. NASA’s Reverb web-interface (), projected in the Level 3 processed ortho-ASTER imagery utilised in this study was downloaded from To acquire imagery of glacierised regions free of charge (Racoviteanu et al., 2008). Affiliates of the GLIMS project (such as the author) are able The use of ASTER data for such applications is aided by the low cost of the Paul & Svoboda, 2009 Bhambri et al., 2011 Gjermundsen etĪl., 2011). Other things, a number of land-cover change applications including the monitoring of Table 4.2: ASTER satellite sensor characteristics. SensorĬharacteristics are summarised in table 4.2. Resolution from 15 m in the VNIR to 30 m in the SWIR, and 90 m in the TIR. ASTER collects data in 14 spectral channels, ranging in spatial Image ID: df – ‘For’ camera strip da – ‘Aft’ camera strip # - image strip number ID a, b, c, d: Camera strip sub-set.ĪSTER is an imaging sensor that was launched on board NASA’s Terra satellite inĭecember, 1999. Table 4.1: Corona image strips used for the GC and ND study sites. In total, this project used 21 sub-sets,ġ1 For camera sub-sets and 10 Aft camera subsets (10 stereo pairs). Is cut into four sub-sets (a, b, c, d) by the USGS. The ND site and 8 for the GC site (see Table 4.1). For this project, 14 digitalĬorona image strips, pre-scanned directly from filmstrips at 7 μm, were purchasedįrom the USGS’s Earthexplorer web-interface (), 6 for Used in this study in order to fulfil the aims set out in chapter 1.Ī description of the Corona sensor is given in chapter 2. This chapter outlines the Corona, ASTER and GLIMS glacier outline geospatial data
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