PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-23:12:50
G01     55.5           28.7               10.3 +/-    1.06      18.6 +/-    1.06  0.060 / 0.100
G07     144.3          18.4               15.8 +/-    1.82      36.1 +/-    1.82  0.050 / 0.090
G11     47.2           21.9                9.5 +/-    1.10      19.9 +/-    1.10  0.020 / 0.080
G13     257.6          33.3               13.7 +/-    1.24      22.5 +/-    1.24  0.040 / 0.040
G15     289.0          16.5               11.6 +/-    1.39      27.8 +/-    1.39  0.050 / 0.070
G17     268.0          75.5               13.6 +/-    0.54      14.0 +/-    0.54  0.040 / 0.060
G18     40.0           10.3               10.3 +/-    2.58      28.5 +/-    2.58  0.080 / 0.250
G19     238.1          54.4               14.6 +/-    1.36      17.5 +/-    1.36  0.070 / 0.250
G28     44.0           54.9               11.5 +/-    0.98      13.8 +/-    0.98  0.070 / 0.260
G30     146.0          45.0               15.9 +/-    1.36      21.4 +/-    1.36  0.070 / 0.260