PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-12:58:00
G01     45.0           21.1                4.5 +/-    2.71       9.6 +/-    2.71  0.400 / 0.410
G06     175.4          30.9                6.2 +/-    1.64      10.7 +/-    1.64  0.170 / 0.380
G11     43.7           11.5                4.3 +/-    3.32      11.7 +/-    3.32  0.030 / 0.030
G13     243.6          27.9                6.7 +/-    2.02      12.2 +/-    2.02  0.040 / 0.030
G15     279.1          14.3                4.0 +/-    1.62      10.2 +/-    1.62  0.040 / 0.040
G17     322.7          77.1                4.1 +/-    0.48       4.2 +/-    0.48  0.030 / 0.040
G19     257.6          65.9                5.3 +/-    0.80       5.8 +/-    0.80  0.090 / 0.110
G24     318.5          11.6               -6.0 +/-   24.12     -16.3 +/-   24.12  0.080 / 0.120
G28     51.7           55.0                3.6 +/-    0.24       4.3 +/-    0.24  0.100 / 0.210
G30     152.2          36.3                5.4 +/-    1.29       8.3 +/-    1.29  0.080 / 0.240