PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:43:00
G01     116.8          19.6               13.5 +/-    1.09      30.0 +/-    1.09  0.070 / 0.050
G07     86.4           65.5               12.2 +/-    0.50      13.3 +/-    0.50  0.090 / 0.080
G08     44.5           31.2                9.4 +/-    1.00      16.1 +/-    1.00  0.020 / 0.030
G09     176.6          23.3               12.5 +/-    1.22      25.4 +/-    1.22  0.040 / 0.030
G11     104.4          41.0               12.1 +/-    0.99      17.3 +/-    0.99  0.030 / 0.020
G13     316.4          21.3               11.1 +/-    2.27      23.7 +/-    2.27  0.030 / 0.030
G17     203.2          24.7               14.9 +/-    1.67      29.3 +/-    1.67  0.090 / 0.200
G18     91.9           21.8               11.1 +/-    1.32      23.3 +/-    1.32  0.110 / 0.170
G28     298.0          58.4               11.2 +/-    0.88      12.9 +/-    0.88  0.130 / 0.170
G30     353.6          71.3               11.6 +/-    0.87      12.1 +/-    0.87  0.130 / 0.190