PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-07:28:10
G02     219.3          63.5                9.1 +/-    1.04      10.0 +/-    1.04  0.070 / 0.080
G06     52.8           74.0                8.3 +/-    0.41       8.6 +/-    0.41  0.050 / 0.090
G12     319.0          38.0                5.4 +/-    1.00       8.1 +/-    1.00  0.170 / 0.520
G17     61.4           27.9                5.8 +/-    1.02      10.5 +/-    1.02  0.160 / 0.440
G19     40.9           48.5                7.1 +/-    0.37       9.1 +/-    0.37  0.030 / 0.030
G24     255.4          41.1                6.2 +/-    0.84       8.9 +/-    0.84  0.030 / 0.030
G28     124.1          13.3                9.0 +/-    1.21      23.2 +/-    1.21  0.050 / 0.080