PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-05:27:50
G01     81.8           33.1                3.6 +/-    1.25       5.8 +/-    1.25  0.030 / 0.050
G07     131.3          38.9                8.0 +/-    0.67      11.8 +/-    0.67  0.040 / 0.060
G11     62.1           36.6                2.5 +/-    0.50       3.8 +/-    0.50  0.060 / 0.060
G13     287.7          36.8                2.9 +/-    1.00       4.5 +/-    1.00  0.050 / 0.060
G15     309.8          13.2                1.4 +/-    1.52       3.5 +/-    1.52  0.050 / 0.030
G17     220.9          61.3                6.1 +/-    0.68       6.9 +/-    0.68  0.040 / 0.040
G19     218.2          34.7                5.8 +/-    1.09       9.2 +/-    1.09  0.070 / 0.170
G28     4.2            60.8                3.4 +/-    0.64       3.8 +/-    0.64  0.080 / 0.140
G30     122.5          68.5                4.9 +/-    0.39       5.2 +/-    0.39  0.050 / 0.110