Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/27/2020   22:10:56   (   0.14,-128.17) (  -0.52,-131.14)  338.07                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.51,-126.61)  179.76                80
 04/30/2020   10:13:59   (  -0.12,-128.22) (   0.68,-131.88)  416.57                80
 05/01/2020   09:52:34   (  -0.14,-128.23) (  -0.34,-127.35)  100.56                80
 05/03/2020   21:58:25   (   0.12,-128.24) (   0.13,-128.11)   14.64                80
 05/06/2020   10:01:28   (  -0.11,-128.28) (   0.04,-128.85)   65.48                80
 05/07/2020   09:40:03   (  -0.13,-128.28) (  -0.99,-124.32)  451.03                80
 05/08/2020   22:04:40   (   0.10,-128.27) (  -0.19,-129.62)  153.75                80
 05/09/2020   21:43:15   (   0.12,-128.27) (   0.84,-125.09)  362.79                80
 05/11/2020   10:07:42   (  -0.09,-128.29) (   0.35,-130.36)  234.75                80