Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/06/2021   10:01:20   (  -0.15,-128.31) (  -0.03,-128.86)   62.41                80
 03/07/2021   09:39:56   (  -0.15,-128.32) (  -1.06,-124.33)  455.02                80
 03/08/2021   22:01:51   (   0.13,-128.37) (  -0.16,-129.62)  142.85                80
 03/09/2021   21:45:47   (   0.14,-128.39) (   0.88,-125.10)  375.07                80
 03/11/2021   10:07:34   (  -0.12,-128.37) (   0.31,-130.36)  226.70                80
 03/12/2021   09:46:10   (  -0.13,-128.38) (  -0.72,-125.84)  290.54                80
 03/13/2021   22:08:05   (   0.12,-128.43) (  -0.49,-131.13)  308.45                80
 03/14/2021   21:52:00   (   0.12,-128.44) (   0.55,-126.60)  209.33                80
 03/16/2021   10:13:48   (  -0.11,-128.43) (   0.64,-131.87)  391.79                80
 03/17/2021   09:52:22   (  -0.12,-128.43) (  -0.34,-127.33)  125.04                80