PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-09:58:00
G01     319.9          16.4                3.1 +/-    1.86       7.4 +/-    1.86  0.040 / 0.040
G08     259.4          14.7                5.9 +/-    1.32      14.8 +/-    1.32  0.030 / 0.040
G10     76.3           53.5                2.8 +/-    0.28       3.4 +/-    0.28  0.140 / 0.260
G11     304.7          22.3                2.9 +/-    1.73       6.1 +/-    1.73  0.140 / 0.200
G14     290.0          70.7                3.7 +/-    0.70       3.9 +/-    0.70  0.200 / 0.300
G18     305.9          40.4                4.7 +/-    0.70       6.8 +/-    0.70  0.170 / 0.360
G20     103.3          30.7                5.2 +/-    0.92       8.9 +/-    0.92  0.090 / 0.200
G27     227.3          11.1                3.7 +/-    3.79      10.0 +/-    3.79  0.070 / 0.250
G31     177.2          38.3                6.1 +/-    1.29       9.1 +/-    1.29  0.060 / 0.060
G32     346.7          71.5                4.6 +/-    0.40       4.8 +/-    0.40  0.040 / 0.060