PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-22:42:50
G02     210.9          53.9               16.0 +/-    0.65      19.3 +/-    0.65  0.070 / 0.070
G06     98.7           80.5               12.3 +/-    0.29      12.4 +/-    0.29  0.060 / 0.090
G12     314.9          27.3                8.0 +/-    1.29      14.8 +/-    1.29  0.080 / 0.230
G17     51.7           36.2                9.7 +/-    1.07      15.1 +/-    1.07  0.090 / 0.260
G19     31.0           53.4               10.5 +/-    0.57      12.7 +/-    0.57  0.040 / 0.060
G24     273.4          42.6               11.7 +/-    0.93      16.3 +/-    0.93  0.040 / 0.050
G28     116.1          22.7               13.1 +/-    0.95      27.0 +/-    0.95  0.090 / 0.120