http://www.technology-roadmaps.org/ivos/ 2008-02-15T20:24:15+01:00 http://www.technology-roadmaps.org/ivos/ http://www.technology-roadmaps.org/ivos/lib/images/favicon.ico text/html 2007-12-06T18:05:15+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=best_practises&amp;rev=1196960715 ====== CAL/VAL BEST PRACTISES ====== Please list below topics that you consider should be a priority for establishing best practises on. Please comment on those listed by others and if known indicate a possible starting point (Agency or individual). text/html 2007-05-22T17:30:02+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=cal_val_reference_sites&amp;rev=1179847802 **Background:** It is widely accepted that the use of test sites for calibration and validation of Earth Observation sensors is good (if not essential) practise. Such sites provide an ideal way of cross-comparing performance (biases) of different sensors. text/html 2007-05-22T17:33:16+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=start&amp;rev=1179847996 **Background** To meet the needs of the societal themes of GEOSS requires the use of data from many sources and often their synergistic combination. This includes data from different satellite sensor technologies and/or agencies, in-situ and ancillary data and involves a variety of models, algorithms, differing processing and delivery strategies. It is clear that such a system cannot function without a set of clearly defined internationally agreed procedures to allow interoperability. text/html 2007-12-06T16:42:02+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=test_site_applications&amp;rev=1196955722 Please list below applications for which test sites can be used in the context of IVOS: I have started the list: Radiometric Gain Sensor uniformity of response Linearity of sensor text/html 2007-12-06T17:58:35+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=test_site_characteristics&amp;rev=1196960315 ====== TEST SITE CHARACTERISTICS ====== The following is a preliminary list of test site characteristics which should ideally be associated with a test site. Of course not all will be required for all applications and there will also be a need to discriminate within a particular aspect for example: uniformity of reflectance over a particular area <1%, 1 to 3 %, 3 to 5% for example. text/html 2007-12-06T16:33:28+01:00 http://www.technology-roadmaps.org/ivos/doku.php?id=vocabulary&amp;rev=1196955208 Please enter below any Key terminology and an appropriate definition idealy with a reference to its source. If you consider the definition provided for a word is incorrect then please add your corrections below and we can open a debate. As an Example