PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-16:27:50
G01     78.8           33.3               10.3 +/-    0.75      16.9 +/-    0.75  0.050 / 0.080
G07     133.2          37.3               12.5 +/-    1.00      19.0 +/-    1.00  0.040 / 0.080
G11     58.9           35.0                8.7 +/-    0.89      13.9 +/-    0.89  0.030 / 0.050
G13     282.9          37.8               11.2 +/-    0.90      17.0 +/-    0.90  0.030 / 0.040
G15     309.7          12.5                9.5 +/-    2.30      25.0 +/-    2.30  0.060 / 0.110
G17     223.5          61.8               13.5 +/-    0.66      15.1 +/-    0.66  0.070 / 0.120
G18     54.6           21.1                8.4 +/-    1.45      17.9 +/-    1.45  0.040 / 0.050
G19     219.7          33.4               12.1 +/-    1.50      19.8 +/-    1.50  0.040 / 0.060
G28     7.3            60.7               10.2 +/-    0.36      11.5 +/-    0.36  0.030 / 0.050
G30     126.6          68.6               11.9 +/-    0.76      12.7 +/-    0.76  0.040 / 0.060