Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2021 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2021   04:33:16   (   0.13,-128.17) (  -0.05,-129.06)  101.49                80
 09/12/2021   04:15:14   (   0.10,-128.14) (   0.99,-124.07)  463.65                80
 09/13/2021   16:31:26   (  -0.14,-128.07) (  -0.02,-128.68)   68.57                80
 09/14/2021   16:13:24   (  -0.11,-128.05) (  -1.05,-123.69)  496.37                80
 09/16/2021   04:29:44   (   0.15,-128.04) (   0.08,-128.33)   33.83                80
 09/18/2021   16:27:54   (  -0.17,-127.93) (  -0.15,-127.95)    3.27                80
 09/21/2021   04:28:54   (   0.19,-127.90) (   0.28,-127.62)   32.37                80
 09/23/2021   16:27:04   (  -0.20,-127.78) (  -0.34,-127.24)   62.86                80