PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-15:42:50
G01     65.6           31.7                9.6 +/-    0.67      16.2 +/-    0.67  0.090 / 0.170
G07     138.9          23.5               10.7 +/-    1.56      21.6 +/-    1.56  0.090 / 0.180
G11     50.8           28.3                6.9 +/-    1.13      12.6 +/-    1.13  0.030 / 0.040
G13     268.5          37.8               12.5 +/-    1.00      18.8 +/-    1.00  0.030 / 0.040
G15     298.8          16.0                8.5 +/-    2.46      20.7 +/-    2.46  0.050 / 0.090
G17     237.8          70.1               11.8 +/-    0.63      12.5 +/-    0.63  0.050 / 0.090
G18     45.2           15.6                7.3 +/-    2.47      18.0 +/-    2.47  0.040 / 0.050
G19     226.3          46.7               11.0 +/-    2.01      14.4 +/-    2.01  0.040 / 0.060
G28     15.0           60.4               11.0 +/-    0.81      12.5 +/-    0.81  0.070 / 0.180
G30     139.1          55.9               10.8 +/-    0.81      12.7 +/-    0.81  0.060 / 0.150