PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-14:12:30
G01     125.7688       12.4481          2.3545 +/- 10.4131    6.2223 +/- 10.4131  0.060 / 0.080
G07     64.7893        67.0159         10.2545 +/-  0.8463   11.0385 +/-  0.8463  0.060 / 0.080
G08     48.9090        36.8234         -9.8574 +/- 14.8471  -15.1344 +/- 14.8471  0.020 / 0.030
G09     176.7683       33.6649          9.1650 +/-  1.2905   14.9156 +/-  1.2905  0.020 / 0.030
G11     113.5362       34.6209         25.3679 +/- 10.6720   40.5440 +/- 10.6720  0.130 / 0.000
G13     321.5267       10.8466         -4.4973 +/- 18.1310  -12.3198 +/- 18.1310  0.140 / 0.320
G17     199.3690       18.2790          5.9193 +/-  2.2315   13.5857 +/-  2.2315  0.220 / 0.360
G28     278.3745       53.3589        -72.9521 +/- 48.8690  -88.4702 +/- 48.8690  0.170 / 0.350
G30     331.4158       59.1936         -3.1242 +/-  6.6963   -3.5735 +/-  6.6963  0.040 / 0.030