PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-19:43:00
G01     100.5          28.1               12.2 +/-    0.95      22.3 +/-    0.95  0.060 / 0.050
G07     117.4          47.5               12.3 +/-    0.59      16.0 +/-    0.59  0.050 / 0.050
G08     41.5           14.6                7.9 +/-    1.66      19.8 +/-    1.66  0.220 / 0.440
G11     78.9           42.4               11.0 +/-    1.48      15.5 +/-    1.48  0.190 / 0.380
G13     304.1          32.8                9.2 +/-    2.44      15.1 +/-    2.44  0.060 / 0.050
G17     207.5          44.6               13.2 +/-    0.80      17.9 +/-    0.80  0.050 / 0.040
G18     71.5           24.0                9.9 +/-    1.57      19.8 +/-    1.57  0.060 / 0.130
G19     210.2          18.5                0.2 +/-   17.07       0.4 +/-   17.07  0.070 / 0.150
G28     320.6          60.5                9.5 +/-    0.77      10.8 +/-    0.77  0.040 / 0.020
G30     64.4           79.3               10.6 +/-    0.45      10.8 +/-    0.45  0.040 / 0.030