Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 12 20.  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)
 12/28/2017   09:08:01   ( -80.70, 175.46) 12/28/2017   09:09:02  ( -80.69, 175.42)    1.62                61
 12/28/2017   09:59:01   (  80.70, -17.35) 12/28/2017   09:59:47  (  80.69, -17.33)    0.89                46
 12/28/2017   10:50:02   ( -80.71, 150.09) 12/28/2017   10:50:32  ( -80.69, 150.00)    2.29                30
 12/28/2017   11:41:02   (  80.71, -42.73) 12/28/2017   11:41:17  (  80.70, -42.75)    1.03                15
 12/28/2017   12:32:04   ( -80.70, 124.36) 12/28/2017   12:32:03  ( -80.72, 124.23)    3.00                 1
 12/28/2017   13:23:03   (  80.71, -68.11) 12/28/2017   13:22:47  (  80.70, -68.17)    1.57                16
 12/28/2017   14:14:05   ( -80.70,  98.98) 12/28/2017   14:13:32  ( -80.70,  99.15)    3.12                33
 12/28/2017   15:05:04   (  80.71, -93.49) 12/28/2017   15:04:17  (  80.70, -93.59)    2.24                47
 12/28/2017   15:56:06   ( -80.71,  73.61) 12/28/2017   15:55:02  ( -80.70,  73.73)    2.35                64