PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-06:12:40
G01     57.9           29.7                1.8 +/-    0.36       3.2 +/-    0.36  0.040 / 0.060
G06     183.1          13.0                3.5 +/-    2.69       9.2 +/-    2.69  0.030 / 0.060
G07     143.2          19.8                5.7 +/-    0.68      12.7 +/-    0.68  0.090 / 0.150
G11     47.7           22.3                2.1 +/-    1.02       4.4 +/-    1.02  0.080 / 0.190
G13     261.5          34.2                4.5 +/-    1.69       7.2 +/-    1.69  0.030 / 0.030
G15     291.2          16.8                1.9 +/-    1.26       4.5 +/-    1.26  0.030 / 0.030
G17     271.9          78.2                4.6 +/-    0.56       4.6 +/-    0.56  0.080 / 0.200
G19     235.7          54.0                3.5 +/-    1.48       4.3 +/-    1.48  0.080 / 0.220
G28     40.5           55.6                3.6 +/-    0.34       4.2 +/-    0.34  0.190 / 0.360
G30     144.5          48.2                8.1 +/-    0.68      10.5 +/-    0.68  0.080 / 0.330