Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/01/2021   10:00:23   (   0.17,-128.42) (   0.31,-128.98)   64.30                80
 11/02/2021   09:44:19   (   0.18,-128.43) (  -0.69,-124.45)  452.89                80
 11/03/2021   22:03:39   (  -0.15,-128.44) (  -0.44,-129.78)  151.90                80
 11/04/2021   21:47:35   (  -0.17,-128.44) (   0.57,-125.25)  364.97                80
 11/06/2021   10:06:45   (   0.14,-128.45) (   0.60,-130.52)  236.40                80
 11/07/2021   09:50:42   (   0.15,-128.45) (  -0.41,-125.99)  279.78                80
 11/08/2021   22:10:00   (  -0.12,-128.44) (  -0.77,-131.30)  326.78                80
 11/09/2021   21:53:57   (  -0.14,-128.43) (   0.23,-126.77)  189.11                80
 11/11/2021   10:13:07   (   0.10,-128.43) (   0.93,-132.05)  413.14                80
 11/12/2021   09:57:04   (   0.12,-128.43) (  -0.08,-127.52)  102.65                80
 11/14/2021   22:00:18   (  -0.10,-128.41) (  -0.09,-128.31)   11.86                80