Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/17/2019   21:52:44   (  -0.34,-128.02) (  -0.01,-126.50)  173.05                80
 09/19/2019   10:14:32   (   0.33,-128.00) (   1.15,-131.77)  429.75                80
 09/20/2019   09:53:06   (   0.34,-127.96) (   0.18,-127.23)   83.24                80
 09/22/2019   21:56:18   (  -0.33,-127.85) (  -0.33,-128.01)   17.18                80
 09/23/2019   21:40:13   (  -0.33,-127.82) (   0.63,-123.46)  495.78                80
 09/25/2019   10:02:01   (   0.31,-127.78) (   0.51,-128.74)  108.49                80
 09/26/2019   09:40:36   (   0.32,-127.74) (  -0.46,-124.19)  403.64                80
 09/27/2019   22:02:32   (  -0.30,-127.65) (  -0.71,-129.50)  210.95                80
 09/28/2019   21:46:26   (  -0.31,-127.61) (   0.26,-124.96)  301.53                80
 09/30/2019   10:05:35   (   0.29,-127.58) (   0.89,-130.23)  302.38                80
 10/01/2019   09:49:30   (   0.30,-127.53) (  -0.14,-125.70)  209.51                80