PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-12:27:50
G01     122.8          13.9                5.9 +/-    2.48      15.1 +/-    2.48  0.030 / 0.040
G07     73.2           66.2                6.8 +/-    0.42       7.3 +/-    0.42  0.030 / 0.040
G08     49.1           39.0                5.2 +/-    1.95       7.6 +/-    1.95  0.180 / 0.170
G09     178.0          32.9                5.6 +/-    1.28       9.3 +/-    1.28  0.110 / 0.140
G11     113.9          38.3                7.3 +/-    1.37      11.0 +/-    1.37  0.080 / 0.090
G13     319.5          16.0                2.7 +/-    2.93       6.6 +/-    2.93  0.050 / 0.140
G17     200.9          15.8                5.9 +/-    1.67      14.3 +/-    1.67  0.060 / 0.090
G18     98.9           18.5                5.6 +/-    2.04      12.9 +/-    2.04  0.080 / 0.090
G28     275.3          50.3                5.5 +/-    2.84       6.9 +/-    2.84  0.040 / 0.070
G30     339.5          65.0                5.2 +/-    0.68       5.7 +/-    0.68  0.040 / 0.060