Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 7 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)
 07/28/2021   09:59:26   (  -0.13,-127.82) (   0.10,-128.93)  125.17                80
 07/29/2021   09:43:21   (  -0.12,-127.86) (  -0.89,-124.39)  394.84                80
 07/30/2021   22:02:39   (   0.14,-127.80) (  -0.30,-129.70)  217.09                80
 07/31/2021   21:46:35   (   0.13,-127.83) (   0.74,-125.17)  302.62                80
 08/02/2021   10:05:44   (  -0.15,-127.98) (   0.40,-130.45)  282.14                80
 08/03/2021   09:49:40   (  -0.15,-128.00) (  -0.58,-125.92)  237.17                80
 08/04/2021   22:08:58   (   0.17,-127.93) (  -0.55,-131.24)  375.98                80
 08/05/2021   21:52:54   (   0.16,-127.96) (   0.44,-126.70)  142.87                80
 08/07/2021   10:12:03   (  -0.19,-128.10) (   0.70,-131.98)  443.17                80
 08/08/2021   09:56:00   (  -0.18,-128.12) (  -0.35,-127.46)   75.52                80
 08/10/2021   21:56:32   (   0.19,-128.06) (   0.15,-128.23)   19.80                80