PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-02:27:50
G01     122.0          15.4                9.7 +/-    0.83      23.9 +/-    0.83  0.030 / 0.040
G07     76.2           66.2                7.2 +/-    0.93       7.8 +/-    0.93  0.040 / 0.040
G08     45.6           32.1                4.7 +/-    0.62       7.9 +/-    0.62  0.060 / 0.080
G09     176.2          28.4               11.7 +/-    3.40      21.2 +/-    3.40  0.080 / 0.070
G11     109.0          38.8               10.6 +/-    0.68      15.7 +/-    0.68  0.090 / 0.220
G13     319.0          17.0                2.0 +/-    1.36       4.7 +/-    1.36  0.080 / 0.220
G17     199.7          23.3                6.0 +/-    2.16      12.2 +/-    2.16  0.130 / 0.280
G18     94.0           19.1               10.1 +/-    1.16      22.6 +/-    1.16  0.090 / 0.220
G28     282.9          54.2                7.0 +/-    1.01       8.4 +/-    1.01  0.040 / 0.040
G30     338.5          64.7                4.0 +/-    0.54       4.4 +/-    0.54  0.040 / 0.040