Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/15/2019   09:46:52   (   0.35,-128.10) (  -0.16,-125.73)  270.09                80
 09/16/2019   22:08:48   (  -0.34,-128.04) (  -1.02,-131.03)  341.34                80
 09/17/2019   21:52:44   (  -0.34,-128.01) (   0.01,-126.50)  172.50                80
 09/19/2019   10:14:31   (   0.33,-128.00) (   1.20,-131.76)  429.81                80
 09/20/2019   09:53:07   (   0.34,-127.96) (   0.17,-127.24)   83.11                80
 09/22/2019   21:56:17   (  -0.33,-127.84) (  -0.38,-128.00)   17.98                80
 09/23/2019   21:40:13   (  -0.33,-127.81) (   0.65,-123.47)  494.81                80
 09/25/2019   10:02:01   (   0.31,-127.78) (   0.50,-128.74)  109.01                80
 09/26/2019   09:40:36   (   0.32,-127.74) (  -0.47,-124.20)  403.07                80
 09/27/2019   22:02:32   (  -0.30,-127.64) (  -0.70,-129.50)  212.20                80