Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2019   10:14:32   (   0.33,-128.00) (   1.17,-131.77)  429.73                80
 09/20/2019   09:53:06   (   0.34,-127.96) (   0.20,-127.23)   83.35                80
 09/22/2019   21:56:18   (  -0.33,-127.85) (  -0.35,-128.00)   16.55                80
 09/23/2019   21:40:13   (  -0.33,-127.82) (   0.67,-123.47)  496.22                80
 09/25/2019   09:59:21   (   0.31,-127.78) (   0.53,-128.73)  108.19                80
 09/26/2019   09:40:36   (   0.32,-127.74) (  -0.50,-124.20)  403.97                80
 09/27/2019   22:02:32   (  -0.30,-127.65) (  -0.73,-129.49)  210.33                80
 09/28/2019   21:46:27   (  -0.31,-127.61) (   0.30,-124.97)  302.19                80
 09/30/2019   10:05:34   (   0.29,-127.58) (   0.91,-130.23)  301.86                80
 10/01/2019   09:49:30   (   0.30,-127.54) (  -0.12,-125.70)  210.08                80