Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/30/2021   21:57:31   (  -0.03,-128.20) (  -0.08,-128.27)    9.85                80
 12/03/2021   10:00:32   (   0.02,-128.12) (   0.22,-129.01)  100.82                80
 12/04/2021   09:44:25   (   0.04,-128.09) (  -0.75,-124.47)  413.06                80
 12/05/2021   22:03:41   (  -0.01,-128.05) (  -0.40,-129.77)  195.86                80
 12/06/2021   21:47:34   (  -0.03,-128.02) (   0.57,-125.23)  317.76                80
 12/08/2021   10:06:41   (   0.00,-127.97) (   0.59,-130.50)  289.09                80
 12/09/2021   09:50:35   (   0.01,-127.93) (  -0.44,-125.97)  224.31                80
 12/10/2021   22:09:49   (   0.01,-127.89) (  -0.76,-131.26)  385.19                80
 12/11/2021   21:53:44   (   0.00,-127.86) (   0.27,-126.73)  128.42                80