PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-01:27:50
G01     65.3           32.0                6.2 +/-    1.30      10.4 +/-    1.30  0.050 / 0.050
G07     140.1          26.9                9.3 +/-    1.81      17.4 +/-    1.81  0.030 / 0.040
G11     52.3           29.7                5.7 +/-    0.89       9.9 +/-    0.89  0.050 / 0.060
G13     269.3          36.4                8.9 +/-    1.26      13.7 +/-    1.26  0.040 / 0.070
G15     297.6          16.5                7.7 +/-    0.99      18.5 +/-    0.99  0.030 / 0.030
G17     242.4          71.2                8.0 +/-    0.71       8.4 +/-    0.71  0.030 / 0.030
G19     228.3          46.7                7.9 +/-    2.19      10.5 +/-    2.19  0.060 / 0.090
G28     29.0           57.8                7.4 +/-    1.32       8.6 +/-    1.32  0.060 / 0.100
G30     139.4          52.8                9.2 +/-    0.63      11.3 +/-    0.63  0.060 / 0.110