PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-04:42:40
G01     79.0           33.1                3.0 +/-    0.95       4.9 +/-    0.95  0.040 / 0.070
G07     133.0          35.0                5.0 +/-    0.71       8.0 +/-    0.71  0.050 / 0.080
G11     57.6           34.0                3.4 +/-    2.11       5.6 +/-    2.11  0.110 / 0.180
G13     282.9          38.2                3.0 +/-    2.98       4.6 +/-    2.98  0.100 / 0.180
G15     309.6          12.6                2.1 +/-    1.92       5.5 +/-    1.92  0.050 / 0.090
G17     222.7          65.7                4.6 +/-    0.64       5.0 +/-    0.64  0.060 / 0.100
G18     52.0           19.1                2.4 +/-    2.85       5.3 +/-    2.85  0.040 / 0.050
G19     219.2          33.5                4.6 +/-    1.44       7.5 +/-    1.44  0.040 / 0.050
G28     2.3            61.2                2.1 +/-    0.67       2.4 +/-    0.67  0.030 / 0.030
G30     126.0          70.0                5.2 +/-    0.44       5.5 +/-    0.44  0.030 / 0.030