PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-03:12:40
G01     81.9           33.1                5.9 +/-    0.95       9.7 +/-    0.95  0.040 / 0.070
G07     131.3          39.4                7.8 +/-    0.88      11.4 +/-    0.88  0.040 / 0.050
G11     63.0           37.5                5.5 +/-    0.60       8.3 +/-    0.60  0.070 / 0.190
G13     287.4          36.9                4.6 +/-    1.02       7.1 +/-    1.02  0.100 / 0.200
G15     309.6          13.3                2.6 +/-    1.17       6.7 +/-    1.17  0.040 / 0.050
G17     220.9          60.1                7.4 +/-    0.56       8.4 +/-    0.56  0.040 / 0.040
G19     218.2          34.3                6.6 +/-    1.21      10.5 +/-    1.21  0.040 / 0.080
G28     4.1            60.9                4.5 +/-    0.52       5.0 +/-    0.52  0.040 / 0.070
G30     123.4          66.9                6.5 +/-    0.36       7.0 +/-    0.36  0.060 / 0.110