Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/22/2021   09:50:17   (   0.24,-128.31) (  -0.31,-125.91)  273.17                80
 10/23/2021   22:09:37   (  -0.21,-128.32) (  -0.83,-131.23)  330.95                80
 10/24/2021   21:53:33   (  -0.22,-128.34) (   0.16,-126.70)  186.92                80
 10/26/2021   10:12:43   (   0.19,-128.36) (   1.01,-131.98)  411.91                80
 10/27/2021   09:56:40   (   0.20,-128.38) (   0.01,-127.45)  105.45                80
 10/29/2021   21:59:56   (  -0.18,-128.39) (  -0.15,-128.24)   17.14                80
 11/01/2021   10:00:23   (   0.17,-128.42) (   0.32,-128.98)   65.45                80
 11/02/2021   09:44:20   (   0.18,-128.42) (  -0.73,-124.47)  451.49                80
 11/03/2021   22:03:38   (  -0.15,-128.42) (  -0.45,-129.78)  154.85                80
 11/04/2021   21:47:35   (  -0.17,-128.42) (   0.55,-125.25)  361.70                80