PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-13:42:50
G01     72.8           32.5                6.1 +/-    1.30      10.2 +/-    1.30  0.040 / 0.050
G07     135.5          30.0                7.1 +/-    0.69      12.4 +/-    0.69  0.060 / 0.060
G11     55.3           33.2                7.6 +/-    1.30      12.4 +/-    1.30  0.060 / 0.080
G13     276.6          38.8                8.6 +/-    1.62      12.8 +/-    1.62  0.060 / 0.110
G15     304.8          14.6                4.1 +/-    2.11      10.3 +/-    2.11  0.040 / 0.030
G17     226.8          63.0                9.5 +/-    1.08      10.6 +/-    1.08  0.060 / 0.040
G18     50.2           19.0                6.6 +/-    1.72      14.8 +/-    1.72  0.070 / 0.080
G19     221.3          41.1                9.9 +/-    1.50      14.1 +/-    1.50  0.080 / 0.090
G28     1.9            61.3                6.9 +/-    0.85       7.8 +/-    0.85  0.130 / 0.250
G30     132.8          63.6                8.2 +/-    0.43       9.1 +/-    0.43  0.090 / 0.250