PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-11:57:20
G02     203.2          31.4                5.1 +/-    0.86       8.6 +/-    0.86  0.060 / 0.090
G06     158.4          67.9                4.9 +/-    0.88       5.3 +/-    0.88  0.060 / 0.090
G12     306.3          15.0                3.3 +/-    1.87       8.1 +/-    1.87  0.030 / 0.040
G17     32.4           51.9                3.3 +/-    0.66       4.1 +/-    0.66  0.030 / 0.050
G19     2.1            65.5                4.1 +/-    0.57       4.5 +/-    0.57  0.110 / 0.330
G24     300.4          36.1                5.9 +/-    0.59       9.1 +/-    0.59  0.110 / 0.330
G28     96.7           38.5                4.3 +/-    0.72       6.4 +/-    0.72  0.040 / 0.040