PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-17:42:50
G01     106.8          25.0               13.3 +/-    0.76      26.0 +/-    0.76  0.060 / 0.070
G07     110.1          52.3               13.5 +/-    1.00      16.6 +/-    1.00  0.060 / 0.050
G08     41.8           20.6               11.4 +/-    2.71      24.6 +/-    2.71  0.030 / 0.040
G09     175.7          15.3               12.0 +/-    1.61      29.6 +/-    1.61  0.030 / 0.050
G11     87.9           43.1               14.8 +/-    1.25      20.5 +/-    1.25  0.050 / 0.070
G13     309.4          29.3               12.9 +/-    1.25      22.9 +/-    1.25  0.070 / 0.070
G17     205.0          37.2               14.1 +/-    0.67      21.4 +/-    0.67  0.080 / 0.180
G18     78.8           23.8               12.0 +/-    1.16      24.1 +/-    1.16  0.080 / 0.180
G28     307.7          58.9               12.8 +/-    1.05      14.7 +/-    1.05  0.260 / 0.320
G30     35.2           78.4               14.4 +/-    0.84      14.7 +/-    0.84  0.170 / 0.360