Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet
This study evaluates if the temporal stability concept is applicable to a time series of satellite soil moisture images so to extend the common procedure of satellite image validation. The area of study is the Maqu area, which is located in the northeastern part of the Tibetan plateau. The network s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/13/8/10725 |
| _version_ | 1811186295018356736 |
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| author | Muhammad Yaseen Tom Rientjes Wouter Verhoef Haris Akram Bhatti |
| author_facet | Muhammad Yaseen Tom Rientjes Wouter Verhoef Haris Akram Bhatti |
| author_sort | Muhammad Yaseen |
| collection | DOAJ |
| description | This study evaluates if the temporal stability concept is applicable to a time series of satellite soil moisture images so to extend the common procedure of satellite image validation. The area of study is the Maqu area, which is located in the northeastern part of the Tibetan plateau. The network serves validation purposes of coarse scale (25–50 km) satellite soil moisture products and comprises 20 stations with probes installed at depths of 5, 10, 20, 40, 80 cm. The study period is 2009. The temporal stability concept is applied to all five depths of the soil moisture measuring network and to a time series of satellite-based moisture products from the Advance Microwave Scanning Radiometer (AMSR-E). The in-situ network is also assessed by Pearsons’s correlation analysis. Assessments by the temporal stability concept proved to be useful and results suggest that probe measurements at 10 cm depth best match to the satellite observations. The Mean Relative Difference plot for satellite pixels shows that a RMSM pixel can be identified but in our case this pixel does not overlay any in-situ station. Also, the RMSM pixel does not overlay any of the Representative Mean Soil Moisture (RMSM) stations of the five probe depths. Pearson’s correlation analysis on in-situ measurements suggests that moisture patterns over time are more persistent than over space. Since this study presents first results on the application of the temporal stability concept to a series of satellite images, we recommend further tests to become more conclusive on effectiveness to broaden the procedure of satellite validation. |
| first_indexed | 2024-04-11T13:43:10Z |
| format | Article |
| id | doaj.art-9158b25d9ca84583ac41242c51121636 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:43:10Z |
| publishDate | 2013-08-01 |
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| spelling | doaj.art-9158b25d9ca84583ac41242c511216362022-12-22T04:21:10ZengMDPI AGSensors1424-82202013-08-01138107251074810.3390/s130810725Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, TibetMuhammad YaseenTom RientjesWouter VerhoefHaris Akram BhattiThis study evaluates if the temporal stability concept is applicable to a time series of satellite soil moisture images so to extend the common procedure of satellite image validation. The area of study is the Maqu area, which is located in the northeastern part of the Tibetan plateau. The network serves validation purposes of coarse scale (25–50 km) satellite soil moisture products and comprises 20 stations with probes installed at depths of 5, 10, 20, 40, 80 cm. The study period is 2009. The temporal stability concept is applied to all five depths of the soil moisture measuring network and to a time series of satellite-based moisture products from the Advance Microwave Scanning Radiometer (AMSR-E). The in-situ network is also assessed by Pearsons’s correlation analysis. Assessments by the temporal stability concept proved to be useful and results suggest that probe measurements at 10 cm depth best match to the satellite observations. The Mean Relative Difference plot for satellite pixels shows that a RMSM pixel can be identified but in our case this pixel does not overlay any in-situ station. Also, the RMSM pixel does not overlay any of the Representative Mean Soil Moisture (RMSM) stations of the five probe depths. Pearson’s correlation analysis on in-situ measurements suggests that moisture patterns over time are more persistent than over space. Since this study presents first results on the application of the temporal stability concept to a series of satellite images, we recommend further tests to become more conclusive on effectiveness to broaden the procedure of satellite validation.http://www.mdpi.com/1424-8220/13/8/10725temporal stabilityrepresentative mean soil moisture (RMSM)correlationadvance microwave scanning radiometer (AMSR-E)satellite validation |
| spellingShingle | Muhammad Yaseen Tom Rientjes Wouter Verhoef Haris Akram Bhatti Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet Sensors temporal stability representative mean soil moisture (RMSM) correlation advance microwave scanning radiometer (AMSR-E) satellite validation |
| title | Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet |
| title_full | Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet |
| title_fullStr | Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet |
| title_full_unstemmed | Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet |
| title_short | Assessing Temporal Stability for Coarse Scale Satellite Moisture Validation in the Maqu Area, Tibet |
| title_sort | assessing temporal stability for coarse scale satellite moisture validation in the maqu area tibet |
| topic | temporal stability representative mean soil moisture (RMSM) correlation advance microwave scanning radiometer (AMSR-E) satellite validation |
| url | http://www.mdpi.com/1424-8220/13/8/10725 |
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