PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-19:58:10
G01     79.8           33.3               10.1 +/-    0.99      16.5 +/-    0.99  0.150 / 0.300
G07     132.6          38.3               14.0 +/-    0.73      20.9 +/-    0.73  0.140 / 0.240
G11     60.6           36.4               10.8 +/-    0.80      16.6 +/-    0.80  0.040 / 0.070
G13     284.3          37.6               12.7 +/-    0.68      19.2 +/-    0.68  0.040 / 0.070
G15     309.1          13.2                9.4 +/-    2.59      24.4 +/-    2.59  0.110 / 0.080
G17     222.6          58.2               14.5 +/-    1.92      16.8 +/-    1.92  0.080 / 0.060
G18     55.8           21.7                8.9 +/-    4.03      18.8 +/-    4.03  0.110 / 0.240
G19     219.2          33.9               15.1 +/-    1.57      24.5 +/-    1.57  0.210 / 0.260
G28     6.5            60.7               10.9 +/-    1.42      12.2 +/-    1.42  0.030 / 0.050
G30     125.7          67.7               14.0 +/-    0.64      15.0 +/-    0.64  0.040 / 0.050