Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2021   22:03:58   (  -0.08,-128.39) (  -0.38,-129.82)  162.19                80
 11/20/2021   21:47:51   (  -0.09,-128.38) (   0.58,-125.27)  353.46                80
 11/22/2021   10:06:59   (   0.06,-128.35) (   0.55,-130.55)  250.31                80
 11/23/2021   09:50:52   (   0.08,-128.33) (  -0.42,-126.01)  264.78                80
 11/24/2021   22:10:07   (  -0.05,-128.31) (  -0.74,-131.31)  342.98                80
 11/25/2021   21:54:02   (  -0.06,-128.29) (   0.29,-126.78)  171.95                80
 11/27/2021   10:13:08   (   0.03,-128.26) (   0.89,-132.05)  432.36                80
 11/28/2021   09:57:03   (   0.04,-128.24) (  -0.13,-127.52)   82.24                80
 11/30/2021   21:57:32   (  -0.03,-128.18) (  -0.05,-128.28)   11.86                80