Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 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)
 11/28/2021   09:57:03   (   0.04,-128.24) (  -0.14,-127.52)   82.85                80
 11/30/2021   21:57:32   (  -0.03,-128.19) (  -0.04,-128.28)    9.63                80
 12/03/2021   10:00:31   (   0.02,-128.12) (   0.25,-129.00)  101.17                80
 12/04/2021   09:44:26   (   0.04,-128.09) (  -0.78,-124.47)  412.68                80
 12/05/2021   22:03:40   (  -0.01,-128.05) (  -0.42,-129.77)  196.42                80
 12/06/2021   21:47:35   (  -0.03,-128.02) (   0.60,-125.24)  317.15                80
 12/08/2021   10:06:41   (   0.00,-127.96) (   0.56,-130.51)  289.70                80
 12/09/2021   09:50:35   (   0.01,-127.93) (  -0.41,-125.96)  223.63                80
 12/10/2021   22:09:50   (   0.01,-127.88) (  -0.73,-131.27)  386.04                80
 12/11/2021   21:53:44   (   0.00,-127.85) (   0.24,-126.73)  127.49                80