PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-17:58:10
G01     127.8          10.2               -5.1 +/-   33.76     -14.2 +/-   33.76  0.080 / 0.130
G07     63.8           66.4               11.8 +/-    0.85      12.8 +/-    0.85  0.080 / 0.110
G08     51.6           40.4               10.0 +/-    1.06      14.5 +/-    1.06  0.030 / 0.030
G09     179.2          39.4               13.8 +/-    0.56      20.2 +/-    0.56  0.030 / 0.040
G11     118.8          35.0               13.3 +/-    0.61      21.1 +/-    0.61  0.040 / 0.040
G17     199.1          13.4               13.8 +/-    4.75      35.6 +/-    4.75  0.030 / 0.040
G18     103.2          15.8               11.9 +/-    2.21      29.1 +/-    2.21  0.120 / 0.270
G27     37.7           10.0                9.0 +/-    3.08      25.1 +/-    3.08  0.090 / 0.390
G28     268.8          48.3               13.5 +/-    2.38      17.4 +/-    2.38  0.100 / 0.330
G30     333.2          60.7               11.0 +/-    0.65      12.4 +/-    0.65  0.130 / 0.260