Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 12 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2021   21:53:44   (   0.00,-127.87) (   0.28,-126.73)  130.57                80
 12/13/2021   10:12:50   (  -0.02,-127.82) (   0.93,-131.99)  476.23                80
 12/14/2021   09:56:44   (  -0.01,-127.78) (  -0.10,-127.46)   37.09                80
 12/16/2021   21:57:13   (   0.02,-127.70) (  -0.08,-128.22)   59.59                80
 12/17/2021   21:41:06   (   0.00,-127.66) (   0.90,-123.68)  453.40                80
 12/19/2021   10:00:12   (  -0.02,-127.59) (   0.31,-128.94)  154.42                80
 12/20/2021   09:44:06   (  -0.01,-127.55) (  -0.72,-124.41)  357.98                80
 12/21/2021   22:03:21   (   0.03,-127.48) (  -0.48,-129.70)  253.25                80
 12/22/2021   21:47:14   (   0.02,-127.44) (   0.50,-125.16)  259.00                80
 12/24/2021   10:06:20   (  -0.04,-127.36) (   0.65,-130.43)  349.32                80