PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:13:10
G07     75.9           64.6               12.8 +/-    0.33      14.0 +/-    0.33  0.120 / 0.410
G08     48.1           36.5                9.6 +/-    0.44      14.9 +/-    0.44  0.120 / 0.320
G09     178.5          34.1               12.7 +/-    1.67      20.5 +/-    1.67  0.040 / 0.040
G11     113.3          37.7               14.0 +/-    1.32      21.1 +/-    1.32  0.040 / 0.040
G13     319.9          15.0                9.6 +/-    2.16      24.0 +/-    2.16  0.110 / 0.360
G17     199.7          18.2               15.7 +/-    1.33      36.0 +/-    1.33  0.150 / 0.620
G18     98.6           18.0               11.6 +/-    1.41      26.8 +/-    1.41  0.090 / 0.090
G28     275.7          51.1               13.5 +/-    1.45      16.8 +/-    1.45  0.060 / 0.100
G30     339.5          64.7               12.2 +/-    0.87      13.3 +/-    0.87  0.060 / 0.080