PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/27-14:43:10
G01     44.0           20.1                6.7 +/-    2.64      14.7 +/-    2.64  0.040 / 0.050
G06     175.4          32.3                9.4 +/-    1.71      15.8 +/-    1.71  0.050 / 0.060
G11     43.5           9.7                 5.0 +/-    5.65      14.1 +/-    5.65  0.150 / 0.250
G13     242.1          26.8                9.6 +/-    2.60      17.9 +/-    2.60  0.130 / 0.220
G15     276.9          14.1                7.5 +/-    1.64      19.2 +/-    1.64  0.030 / 0.020
G17     329.7          76.4                8.1 +/-    0.41       8.3 +/-    0.41  0.030 / 0.030
G19     261.2          66.8                9.4 +/-    0.72      10.1 +/-    0.72  0.040 / 0.050
G24     318.2          13.2                5.6 +/-    2.74      14.5 +/-    2.74  0.040 / 0.040
G28     55.0           54.1                8.0 +/-    0.72       9.7 +/-    0.72  0.110 / 0.100
G30     152.4          33.5                8.4 +/-    0.95      13.7 +/-    0.95  0.090 / 0.100