PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-16:27:50
G01     74.2           33.2                8.7 +/-    0.68      14.2 +/-    0.68  0.080 / 0.230
G07     135.7          33.8               11.9 +/-    1.11      19.3 +/-    1.11  0.150 / 0.190
G11     55.7           32.6                8.0 +/-    1.04      13.3 +/-    1.04  0.040 / 0.040
G13     278.0          37.8                9.5 +/-    1.22      14.3 +/-    1.22  0.030 / 0.020
G15     306.7          13.6                6.9 +/-    1.48      17.8 +/-    1.48  0.050 / 0.080
G17     228.5          65.5               10.9 +/-    1.21      11.8 +/-    1.21  0.060 / 0.070
G18     51.3           19.5                9.0 +/-    3.44      20.1 +/-    3.44  0.040 / 0.040
G19     222.1          36.9               11.1 +/-    1.91      17.0 +/-    1.91  0.030 / 0.060
G28     14.4           59.9               10.0 +/-    1.20      11.4 +/-    1.20  0.120 / 0.120
G30     132.2          65.0               11.2 +/-    0.27      12.2 +/-    0.27  0.090 / 0.130