PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-07:28:10
G10     304.0          54.3                3.4 +/-    1.09       4.1 +/-    1.09  0.050 / 0.040
G14     210.7          15.6                5.4 +/-    6.31      13.3 +/-    6.31  0.040 / 0.040
G15     45.6           23.7                2.0 +/-    1.01       4.0 +/-    1.01  0.040 / 0.050
G20     1.6            64.9                2.8 +/-    1.33       3.1 +/-    1.33  0.030 / 0.040
G21     108.7          70.0                4.4 +/-    0.96       4.6 +/-    0.96  0.080 / 0.100
G24     92.6           27.6                5.3 +/-    0.99       9.7 +/-    0.99  0.060 / 0.090
G27     298.2          34.8                5.3 +/-    1.64       8.4 +/-    1.64  0.080 / 0.130
G32     212.7          30.7                5.8 +/-    1.90      10.1 +/-    1.90  0.080 / 0.140