PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/04-11:57:40
G10     281.8          46.3                3.5 +/-    1.66       4.6 +/-    1.66  0.090 / 0.150
G15     49.6           38.3                2.1 +/-    0.64       3.1 +/-    0.64  0.090 / 0.170
G20     324.6          64.5                2.1 +/-    0.45       2.3 +/-    0.45  0.050 / 0.060
G21     68.9           74.6                5.2 +/-    0.74       5.3 +/-    0.74  0.040 / 0.050
G24     106.6          21.2                5.0 +/-    0.46      10.7 +/-    0.46  0.040 / 0.050
G27     313.0          25.7                2.7 +/-    1.26       5.1 +/-    1.26  0.040 / 0.040
G29     166.6          15.6                2.2 +/-    1.67       5.4 +/-    1.67  0.040 / 0.060
G32     207.1          18.1                2.9 +/-    1.93       6.6 +/-    1.93  0.030 / 0.060