PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-04:28:00
G01     94.6           30.7                6.0 +/-    1.46      10.4 +/-    1.46  0.030 / 0.040
G07     121.7          48.5                5.7 +/-    0.67       7.3 +/-    0.67  0.040 / 0.050
G08     42.1           10.9                3.2 +/-    3.43       8.8 +/-    3.43  0.040 / 0.050
G11     74.7           41.3                4.3 +/-    1.03       6.1 +/-    1.03  0.050 / 0.040
G13     300.0          33.7                1.5 +/-    1.17       2.4 +/-    1.17  0.410 / 0.330
G17     211.9          50.2                5.5 +/-    0.70       6.9 +/-    0.70  0.110 / 0.330
G19     212.9          24.5                5.1 +/-    2.03      10.1 +/-    2.03  0.060 / 0.090
G28     343.0          61.8                2.3 +/-    0.56       2.6 +/-    0.56  0.080 / 0.070
G30     93.9           76.4                4.3 +/-    0.25       4.4 +/-    0.25  0.080 / 0.110