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. 2022 Nov 11;9:687. doi: 10.1038/s41597-022-01772-x

Table 4.

Scheme to assign the weight values of three SSM products in 1st and 2nd steps (×: soil moisture value of SSM product is not available; О: soil moisture value of SSM product is available).

Merge Steps SMOS FY3-B ASCAT Weight values Result
Triplet 1 × × × w1 = w2 = w3 = 0 1st merged SSM product
О × × w1 = 1, w2 =  w3 = 0
× О × w2 = 1, w1 = w3 = 0
× × О w3 = 1, w1 = w2 = 0
О О × w1 and w2 by Eq. 8, w3 = 0
× О О w2 and w3 by Eq. 8, w1 = 0
О × О w1 and w3 by Eq. 8, w2 = 0
О О О w1, w2 and w3 by Eq. 7
1st merged SSM ESA-CCI SMAP Weight values Result
Triplet 2 × × × w1 = w2 = w3 = 0 2nd merged SSM product
О × × w1 = 1, w2 =  w3 = 0
× О × w2 = 1, w1 = w3 = 0
× × О w3 = 1, w1 = w2 = 0
О О × w1 and w2 by Eq. 8, w3 = 0
× О О w2 and w3 by Eq. 8, w1 = 0
О × О w1 and w3 by Eq. 8, w2 = 0
О О О w1, w2 andw3 by Eq. 7