PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:42:50
G01     78.2           32.9               10.7 +/-    0.58      17.7 +/-    0.58  0.050 / 0.120
G07     133.2          30.6               12.3 +/-    1.06      21.3 +/-    1.06  0.050 / 0.120
G11     57.7           34.5                9.4 +/-    0.80      15.1 +/-    0.80  0.090 / 0.280
G13     282.1          38.6               12.9 +/-    1.37      19.3 +/-    1.37  0.080 / 0.300
G15     307.4          14.0                8.2 +/-    2.23      20.9 +/-    2.23  0.040 / 0.060
G17     222.4          63.5               13.7 +/-    0.93      15.1 +/-    0.93  0.040 / 0.060
G18     52.7           19.9                9.5 +/-    1.04      21.0 +/-    1.04  0.050 / 0.140
G19     219.0          36.3               13.4 +/-    1.12      20.8 +/-    1.12  0.050 / 0.120
G28     357.9          61.4               10.4 +/-    1.00      11.7 +/-    1.00  0.080 / 0.090
G30     127.6          66.2               12.8 +/-    0.43      13.9 +/-    0.43  0.080 / 0.120