PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-10:27:40
G01     318.7          18.7                4.9 +/-    1.61      11.2 +/-    1.61  0.040 / 0.060
G08     260.1          12.6                6.6 +/-    1.47      17.3 +/-    1.47  0.050 / 0.050
G10     81.3           52.8                4.9 +/-    0.44       5.9 +/-    0.44  0.030 / 0.040
G11     303.5          22.5                4.0 +/-    1.33       8.3 +/-    1.33  0.030 / 0.050
G14     290.1          68.4                5.2 +/-    0.91       5.6 +/-    0.91  0.120 / 0.210
G18     304.3          40.2                6.0 +/-    1.52       8.7 +/-    1.52  0.150 / 0.240
G22     302.6          16.2                1.2 +/-    2.30       2.9 +/-    2.30  0.070 / 0.270
G31     173.8          45.0                6.3 +/-    0.95       8.5 +/-    0.95  0.070 / 0.230
G32     13.1           65.6                5.7 +/-    0.33       6.2 +/-    0.33  0.150 / 0.370