Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 5 1.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2023   14:52:26   (  70.70, -47.90) 05/02/2023   14:53:35  (  70.60, -46.51)   52.50                69
 05/02/2023   15:42:58   ( -70.09, 120.38) 05/02/2023   15:43:12  ( -70.10, 120.40)    1.02                14
 05/02/2023   16:33:42   (  69.97, -72.12) 05/02/2023   16:32:39  (  70.00, -72.10)    3.14                63
 05/05/2023   07:09:12   (  70.18,  68.69) 05/05/2023   07:10:09  (  70.16,  68.73)    2.75                57
 05/05/2023   07:59:53   ( -70.04,-123.78) 05/05/2023   07:59:39  ( -70.05,-123.80)    1.06                14
 05/05/2023   08:50:25   (  69.28,  44.64) 05/05/2023   08:49:17  (  69.33,  42.87)   69.92                68
 05/07/2023   23:26:08   (  70.14,-175.48) 05/07/2023   23:26:36  (  70.13,-175.43)    1.99                28
 05/08/2023   00:16:49   ( -69.99,  -7.95) 05/08/2023   00:16:06  ( -70.02,  -7.95)    2.89                43
 05/10/2023   14:52:23   ( -70.37, 132.60) 05/10/2023   14:53:34  ( -70.30, 133.05)   18.83                71
 05/10/2023   15:43:03   (  70.05, -59.59) 05/10/2023   15:43:03  (  70.07, -59.63)    3.23                 0
 05/10/2023   16:33:45   ( -69.96, 107.87) 05/10/2023   16:32:33  ( -69.97, 107.86)    1.35                72
 05/13/2023   07:09:15   ( -70.14,-111.27) 05/13/2023   07:10:02  ( -70.17,-111.26)    3.48                47
 05/13/2023   07:59:59   (  70.02,  56.21) 05/13/2023   07:59:29  (  70.05,  56.22)    3.07                30