Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2021   21:47:52   (  -0.09,-128.38) (   0.61,-125.28)  353.55                80
 11/22/2021   10:06:58   (   0.06,-128.35) (   0.57,-130.55)  250.36                80
 11/23/2021   09:50:53   (   0.08,-128.33) (  -0.45,-126.01)  264.71                80
 11/24/2021   22:10:08   (  -0.05,-128.31) (  -0.70,-131.32)  342.93                80
 11/25/2021   21:54:02   (  -0.06,-128.29) (   0.26,-126.78)  172.00                80
 11/27/2021   10:13:09   (   0.03,-128.26) (   0.86,-132.06)  432.45                80
 11/28/2021   09:57:02   (   0.04,-128.23) (  -0.11,-127.51)   82.14                80
 11/30/2021   21:57:31   (  -0.03,-128.18) (  -0.08,-128.28)   12.17                80
 12/03/2021   10:00:32   (   0.02,-128.11) (   0.23,-129.01)  103.08                80