PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-01:27:50
G01     74.2           33.2                5.3 +/-    1.12       8.7 +/-    1.12  0.030 / 0.060
G07     135.7          33.9                9.1 +/-    1.42      14.8 +/-    1.42  0.030 / 0.050
G11     57.8           34.8                6.4 +/-    0.63      10.2 +/-    0.63  0.040 / 0.030
G13     279.1          37.4                7.1 +/-    1.66      10.7 +/-    1.66  0.040 / 0.040
G15     304.4          15.1                4.5 +/-    1.67      11.2 +/-    1.67  0.050 / 0.090
G17     228.6          64.8                9.0 +/-    1.10       9.8 +/-    1.10  0.210 / 0.270
G19     222.2          39.7                9.6 +/-    1.83      14.1 +/-    1.83  0.080 / 0.090
G28     15.7           59.7                5.6 +/-    0.68       6.4 +/-    0.68  0.070 / 0.080
G30     132.2          60.0                8.4 +/-    0.33       9.5 +/-    0.33  0.060 / 0.090