PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-17:42:50
G02     217.1          58.1               12.2 +/-    0.53      14.1 +/-    0.53  0.040 / 0.070
G06     55.5           73.4               10.4 +/-    0.64      10.8 +/-    0.64  0.080 / 0.070
G12     319.4          37.9                9.6 +/-    1.01      14.4 +/-    1.01  0.050 / 0.080
G17     60.3           29.2                8.3 +/-    1.86      14.7 +/-    1.86  0.050 / 0.090
G19     43.4           46.7                8.1 +/-    0.44      10.6 +/-    0.44  0.060 / 0.100
G24     266.2          41.2               13.8 +/-    1.84      19.7 +/-    1.84  0.060 / 0.100
G28     123.9          12.3                7.1 +/-    3.00      19.0 +/-    3.00  0.040 / 0.050