Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2022 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2022   18:39:17   (   0.04, -75.18) (  -0.77, -78.71)  402.57                80
 12/29/2022   18:23:13   (   0.03, -75.18) (   0.25, -74.18)  113.93                80
 12/31/2022   06:42:21   (  -0.04, -75.19) (   0.89, -79.47)  486.69                80
 01/01/2023   06:24:35   (  -0.03, -75.19) (  -0.07, -74.93)   30.27                21
 01/03/2023   18:26:48   (   0.02, -75.21) (  -0.09, -75.71)   56.31                80
 01/04/2023   18:10:43   (   0.01, -75.22) (   0.94, -71.18)  461.02                80
 01/06/2023   06:32:30   (  -0.01, -75.24) (   0.26, -76.45)  138.41                80
 01/07/2023   06:11:06   (  -0.00, -75.25) (  -0.77, -71.93)  379.14                80
 01/08/2023   18:33:01   (   0.00, -75.27) (  -0.46, -77.23)  223.52                80
 01/09/2023   18:16:57   (  -0.00, -75.28) (   0.58, -72.70)  294.49                80