Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2021   10:06:58   (   0.06,-128.35) (   0.55,-130.55)  250.35                80
 11/23/2021   09:50:53   (   0.08,-128.33) (  -0.47,-126.02)  264.73                80
 11/24/2021   22:10:07   (  -0.05,-128.31) (  -0.74,-131.31)  342.78                80
 11/25/2021   21:54:02   (  -0.06,-128.29) (   0.28,-126.78)  172.15                80
 11/27/2021   10:13:08   (   0.03,-128.26) (   0.90,-132.05)  432.40                80
 11/28/2021   09:57:03   (   0.04,-128.23) (  -0.13,-127.51)   82.19                80
 11/30/2021   21:57:31   (  -0.03,-128.18) (  -0.06,-128.28)   11.70                80
 12/03/2021   10:00:32   (   0.02,-128.11) (   0.21,-129.01)  102.99                80
 12/04/2021   09:44:26   (   0.04,-128.08) (  -0.76,-124.47)  410.60                80