Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/16/2021   09:59:57   (   0.25,-128.18) (   0.41,-128.90)   81.91                80
 10/17/2021   09:43:54   (   0.26,-128.20) (  -0.58,-124.36)  436.69                80
 10/18/2021   22:03:13   (  -0.24,-128.21) (  -0.56,-129.68)  167.35                80
 10/19/2021   21:47:10   (  -0.25,-128.24) (   0.43,-125.15)  351.27                80
 10/21/2021   10:06:21   (   0.22,-128.29) (   0.68,-130.44)  245.30                80
 10/22/2021   09:50:17   (   0.24,-128.30) (  -0.31,-125.91)  272.98                80
 10/23/2021   22:09:36   (  -0.21,-128.31) (  -0.88,-131.22)  332.10                80
 10/24/2021   21:53:32   (  -0.22,-128.33) (   0.12,-126.69)  185.79                80
 10/26/2021   10:12:44   (   0.19,-128.37) (   1.00,-131.98)  412.03                80
 10/27/2021   09:56:40   (   0.20,-128.38) (   0.00,-127.45)  105.37                80
 10/29/2021   21:59:56   (  -0.18,-128.38) (  -0.13,-128.24)   16.47                80