Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 7 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2021   21:40:16   (   0.11,-127.66) (   1.01,-123.64)  458.57                80
 07/28/2021   09:59:25   (  -0.13,-127.83) (   0.14,-128.92)  124.82                80
 07/29/2021   09:43:22   (  -0.12,-127.86) (  -0.91,-124.40)  395.29                80
 07/30/2021   22:02:39   (   0.14,-127.80) (  -0.29,-129.70)  216.83                80
 07/31/2021   21:46:35   (   0.13,-127.83) (   0.70,-125.17)  302.99                80
 08/02/2021   10:05:45   (  -0.15,-127.99) (   0.39,-130.46)  281.25                80
 08/03/2021   09:49:40   (  -0.15,-128.01) (  -0.60,-125.92)  238.15                80
 08/04/2021   22:08:58   (   0.17,-127.94) (  -0.59,-131.23)  375.19                80
 08/05/2021   21:52:54   (   0.16,-127.96) (   0.45,-126.71)  143.76                80
 08/07/2021   10:12:03   (  -0.19,-128.11) (   0.69,-131.98)  441.75                80
 08/08/2021   09:56:00   (  -0.18,-128.13) (  -0.36,-127.46)   77.06                80