Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2024 4 18.  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)
 04/18/2024   14:52:58   (  70.07, -47.21) 04/18/2024   14:53:45  (  70.06, -47.27)    3.01                47
 04/18/2024   15:43:40   ( -69.98, 120.25) 04/18/2024   15:43:14  ( -70.00, 120.28)    2.24                26
 04/21/2024   06:19:23   ( -70.90,-100.07) 04/21/2024   06:20:31  ( -70.81, -97.93)   79.07                68
 04/21/2024   07:09:53   (  70.06,  68.58) 04/21/2024   07:10:10  (  70.04,  68.60)    2.69                17
 04/21/2024   08:00:34   ( -69.91,-123.87) 04/21/2024   07:59:40  ( -69.93,-123.93)    2.61                54
 04/23/2024   22:36:03   ( -70.13,  16.95) 04/23/2024   22:37:07  ( -70.14,  16.98)    1.42                64
 04/23/2024   23:26:47   (  70.02,-175.58) 04/23/2024   23:26:34  (  70.02,-175.54)    1.55                13
 04/24/2024   00:17:21   ( -69.50,  -7.48) 04/24/2024   00:16:10  ( -69.58,  -8.51)   40.88                71
 04/26/2024   14:52:57   ( -70.10, 132.78) 04/26/2024   14:53:30  ( -70.12, 132.85)    3.39                33
 04/26/2024   15:43:39   (  69.94, -59.68) 04/26/2024   15:42:57  (  69.94, -59.75)    2.61                42
 04/29/2024   06:19:09   (  70.25,  81.01) 04/29/2024   06:20:21  (  70.20,  81.24)   10.23                72
 04/29/2024   07:09:49   ( -70.04,-111.35) 04/29/2024   07:09:52  ( -70.04,-111.36)    0.38                 3
 04/29/2024   08:00:32   (  69.88,  56.19) 04/29/2024   07:59:19  (  69.91,  56.12)    4.35                73
 05/01/2024   22:36:00   (  70.10,-162.98) 05/01/2024   22:36:43  (  70.11,-162.98)    1.09                43
 05/01/2024   23:26:42   ( -69.99,   4.50) 05/01/2024   23:26:13  ( -70.01,   4.51)    1.30                29