TY  - JOUR
AU  - Kovalskyy, V.
AU  - Roy, David P.
PY  - 2013//
TI  - The global availability of Landsat 5 TM and Landsat 7 ETM+ land surface observations and implications for global 30 m Landsat data product generation
JO  - Remote Sensing of Environment
SP  - 280
EP  - 293
VL  - 130
KW  - application
KW  - archive
KW  - classification
KW  - data
KW  - data set
KW  - Earth
KW  - earth resources
KW  - Earth Resources Observation and Science
KW  - EROS
KW  - ETM
KW  - global
KW  - global 30 m
KW  - global land cover
KW  - impact
KW  - journal articles
KW  - land
KW  - land cover
KW  - land surface
KW  - land-cover
KW  - Landsat
KW  - Landsat 5
KW  - Landsat 5 TM
KW  - Landsat 7
KW  - Landsat 7 ETM+
KW  - Landsat data
KW  - mapping
KW  - metadata
KW  - metadata analysis
KW  - patterns
KW  - policy
KW  - probability
KW  - remote sensing
KW  - resources
KW  - season
KW  - sensor
KW  - stream
KW  - surface observations
KW  - temporal
KW  - TM
KW  - USGS
KW  - utility
N2  - With the advent of the free U.S. Landsat data policy it is now feasible to consider the generation of global coverage 30 m Landsat data sets with temporal reporting frequency similar to that provided by the monthly Web Enabled Landsat (WELD) products. A statistical Landsat metadata analysis is reported considering more than 800,000 Landsat 5 TM and Landsat 7 ETM + acquisitions obtained from the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center archive. The global monthly probabilities of acquiring a cloud-free land surface observation for December 1998 to November 2001 (2000 epoch) and from December 2008 to November 2011 (2010 epoch) are reported to assess the availability of the Landsat data in the USGS Landsat archive for global multi-temporal land remote sensing applications. The global probabilities of acquiring a cloud-free land surface observation in each of three different seasons with the highest seasonal probabilities of cloud-free land surface observation are reported, considering one, two and three years of Landsat data, to assess the availability of Landsat data for global land cover mapping. The probabilities are derived considering Landsat 5 TM only, Landsat 7 ETM + only, and both sensors combined, to examine the relative benefits of using one or both Landsat sensors. The results demonstrate the utility of combing both Landsat 5 TM and Landsat 7 ETM + data streams to take advantage of their different acquisition patterns and to mitigate the deleterious impact of the Landsat 7 ETM + 2003 scan line failure. Sensor combination provided a greater global acquisition coverage with a 1.7% to 14.4% higher percentage of land locations acquired monthly compared to considering Landsat 7 ETM + data alone. The mean global monthly probability of a cloud-free land surface observation for the combined sensors was up to nearly 1.4 and 6.7 times greater than for ETM + and TM alone respectively. The probability of acquiring a cloud-free Landsat land surface observation in different seasons was greater when more years of data were considered and when both Landsat sensor data were combined. Considering combined sensors and 36 months of data, 86.4% and 84.2% of the global land locations had probabilities >= 0.95 for the 2000 and 2010 epochs respectively, with a global mean probability of 0.92 (- 0.24) for the 2000 epoch and 0.90 (- 0.28) for the 2010 epoch. These results indicate that 36 months of combined Landsat sensor data will provide sufficient land surface observations for 30 m global land cover mapping using a multi-temporal supervised classification scheme.
SN  - http://dx.doi.org/10.1016/j.rse.2012.12.003
UR  - http://dx.doi.org/10.1016/j.rse.2012.12.003
N1  - exported from refbase (http://eros.usgs.gov/refbase/show.php?record=25695), last updated on Fri, 01 Mar 2013 14:26:14 -0600
ID  - Kovalskyy+Roy2013
ER  -