Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2021   10:01:15   (  -0.09,-128.39) (   0.02,-128.83)   49.76                80
 03/23/2021   09:39:51   (  -0.09,-128.38) (  -1.02,-124.30)  465.65                80
 03/24/2021   22:01:46   (   0.08,-128.39) (  -0.20,-129.59)  137.30                80
 03/25/2021   21:45:42   (   0.08,-128.39) (   0.84,-125.07)  378.51                80
 03/27/2021   10:07:28   (  -0.07,-128.36) (   0.39,-130.32)  224.36                80
 03/28/2021   09:46:03   (  -0.08,-128.35) (  -0.65,-125.80)  290.48                80
 03/29/2021   22:07:59   (   0.06,-128.34) (  -0.57,-131.09)  314.43                80
 03/30/2021   21:51:54   (   0.07,-128.32) (   0.47,-126.57)  200.76                80
 04/01/2021   10:13:41   (  -0.06,-128.30) (   0.75,-131.82)  402.11                80
 04/02/2021   09:52:16   (  -0.07,-128.28) (  -0.29,-127.29)  111.91                80
 04/03/2021   22:14:11   (   0.05,-128.24) (  -0.92,-132.59)  495.35                80
 04/04/2021   21:58:06   (   0.05,-128.22) (   0.06,-128.05)   19.38                80