Satellite and in-situ data comparison

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There are two modules: satellite/in situ data comparison, and satellite/satellite data comparison (as shown in Figure 2-65).

Figure 2‑65. Comparison analysis tabs.

2.6.1 Satellite and in-situ data comparison

This function carries out satellite data matching and comparative analysis for the in situ data that have been loaded into the layer list (see section 2.3).
Click the button “satellite/in situ,” and the data matching dialog box will pop up (Figure 2-66). First, the system loads the in situ data set (the system will automatically read the start and end times of the in situ data), and then the selected satellite data to be matched. 1) The loaded satellite image can be directly selected for matching the same longitude and latitude (time matching is not considered). 2) Select the setting such as data set, parameter, product level, composite period, and spatial window to be matched. Output are the scattering diagram of in situ and satellite matched data (Figure 2-67).

Figure 2‑66. Data matching box for “satellite to in-situ comparison.” In this case, the temperature data of the CDIAC data set from September 19, 2012 to October 3, 2012 were selected for comparison with the monthly average SST data of NOAA (25-km resolution) in September 2012.

Figure 2‑67. Scatter diagram comparing the matched points of satellite (RS) and in situ data. The x-axis represents the in situ temperature data, and the y-axis represents the satellite SST data. The green line represents the 1:1 line. There are 736 in situ data points and 735 matched satellite points obtained.

2.6.1 Satellite and in-situ data comparison

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