Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 7 27.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2017   20:38:56   (  80.80,-179.48) 07/30/2017   20:40:10  (  80.81,-179.59)    1.98                74
 07/30/2017   21:29:52   ( -80.81, -12.08) 07/30/2017   21:30:55  ( -80.81, -12.25)    3.02                63
 07/30/2017   22:20:57   (  80.81, 155.21) 07/30/2017   22:21:40  (  80.81, 155.03)    3.27                43
 07/30/2017   23:11:54   ( -80.80, -37.75) 07/30/2017   23:12:25  ( -80.81, -37.64)    2.12                31
 07/31/2017   00:02:59   (  80.80, 129.53) 07/31/2017   00:03:10  (  80.81, 129.64)    1.97                11
 07/31/2017   00:53:55   ( -80.81, -63.06) 07/31/2017   00:53:55  ( -80.81, -63.02)    0.60                 0
 07/31/2017   01:45:00   (  80.81, 104.23) 07/31/2017   01:44:40  (  80.81, 104.25)    0.48                20
 07/31/2017   02:35:56   ( -80.81, -88.36) 07/31/2017   02:35:25  ( -80.81, -88.41)    0.95                31
 07/31/2017   03:27:01   (  80.81,  78.92) 07/31/2017   03:26:10  (  80.81,  78.86)    1.00                51