PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-16:58:10
G07     16.0           66.9                9.3 +/-    0.66      10.0 +/-    0.66  0.050 / 0.040
G08     73.4           50.9               10.0 +/-    0.46      12.5 +/-    0.46  0.030 / 0.030
G09     182.8          59.1               13.0 +/-    0.89      14.9 +/-    0.89  0.070 / 0.140
G11     134.8          23.6               11.9 +/-    1.20      24.0 +/-    1.20  0.050 / 0.120
G23     159.0          26.4               11.7 +/-    2.09      22.1 +/-    2.09  0.040 / 0.060
G27     44.9           23.9                8.1 +/-    0.93      16.1 +/-    0.93  0.040 / 0.060
G28     248.0          36.2               11.3 +/-    1.24      17.5 +/-    1.24  0.070 / 0.140
G30     315.3          47.0                9.1 +/-    0.68      12.0 +/-    0.68  0.070 / 0.130