PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-17:58:00
G01     125.3          12.3                9.9 +/-    3.15      26.4 +/-    3.15  0.110 / 0.080
G07     72.1           65.2               10.0 +/-    0.67      10.9 +/-    0.67  0.090 / 0.100
G08     49.2           37.9                8.5 +/-    1.34      12.8 +/-    1.34  0.040 / 0.040
G09     178.7          35.9                9.9 +/-    0.84      15.5 +/-    0.84  0.030 / 0.030
G11     115.3          36.8               10.3 +/-    0.81      15.9 +/-    0.81  0.040 / 0.030
G13     320.4          13.6                7.3 +/-    2.27      18.7 +/-    2.27  0.040 / 0.040
G17     199.5          16.5                9.1 +/-    1.38      21.9 +/-    1.38  0.160 / 0.420
G18     100.2          17.3                8.5 +/-    1.90      19.9 +/-    1.90  0.150 / 0.520
G28     273.2          50.1                8.8 +/-    2.80      11.1 +/-    2.80  0.140 / 0.280
G30     337.4          63.4                9.1 +/-    0.69      10.1 +/-    0.69  0.100 / 0.270