PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-12:58:00
G01     93.2           30.2                5.8 +/-    0.96      10.1 +/-    0.96  0.040 / 0.040
G07     122.5          45.2                5.9 +/-    0.76       8.0 +/-    0.76  0.050 / 0.050
G08     42.0           13.6                4.6 +/-    3.47      11.7 +/-    3.47  0.040 / 0.050
G11     72.8           42.0                4.9 +/-    0.95       6.8 +/-    0.95  0.040 / 0.050
G13     297.9          35.9                5.4 +/-    2.82       8.4 +/-    2.82  0.040 / 0.060
G17     211.6          46.0                4.9 +/-    0.80       6.5 +/-    0.80  0.030 / 0.060
G18     66.6           24.2                5.4 +/-    1.13      10.7 +/-    1.13  0.150 / 0.280
G19     212.0          25.1                4.0 +/-    1.91       7.7 +/-    1.91  0.150 / 0.190
G28     328.1          60.9                3.8 +/-    0.45       4.3 +/-    0.45  0.100 / 0.510
G30     91.7           77.9                5.3 +/-    0.48       5.4 +/-    0.48  0.230 / 0.400