Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.51,-126.61)  179.83                80
 04/30/2020   10:13:58   (  -0.12,-128.22) (   0.69,-131.88)  416.42                80
 05/01/2020   09:52:34   (  -0.14,-128.23) (  -0.34,-127.35)  100.76                80
 05/03/2020   21:58:25   (   0.12,-128.24) (   0.12,-128.11)   15.07                80
 05/06/2020   10:01:28   (  -0.11,-128.28) (   0.04,-128.84)   65.02                80
 05/07/2020   09:40:04   (  -0.13,-128.28) (  -1.04,-124.33)  451.56                80
 05/08/2020   22:04:40   (   0.10,-128.27) (  -0.19,-129.62)  153.14                80
 05/09/2020   21:43:15   (   0.12,-128.28) (   0.84,-125.09)  363.45                80
 05/11/2020   10:07:42   (  -0.09,-128.30) (   0.36,-130.36)  234.00                80
 05/12/2020   09:46:18   (  -0.10,-128.30) (  -0.67,-125.83)  282.05                80