PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-16:57:30
G07     27.6           69.3               11.5 +/-    0.38      12.2 +/-    0.38  0.040 / 0.040
G08     59.2           47.1               10.3 +/-    0.72      13.5 +/-    0.72  0.040 / 0.050
G09     179.1          44.4               14.2 +/-    1.04      19.2 +/-    1.04  0.030 / 0.050
G11     126.9          30.3               13.3 +/-    1.89      23.1 +/-    1.89  0.050 / 0.060
G18     111.1          12.6               10.6 +/-    1.25      27.9 +/-    1.25  0.030 / 0.030
G23     159.0          11.4               12.7 +/-    3.61      34.4 +/-    3.61  0.030 / 0.040
G27     38.7           13.2                7.5 +/-    0.95      19.4 +/-    0.95  0.070 / 0.150
G28     265.2          48.6               14.3 +/-    1.59      18.3 +/-    1.59  0.090 / 0.160
G30     325.5          54.8               10.6 +/-    0.64      12.6 +/-    0.64  0.050 / 0.070