Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 13.  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)
 02/14/2023   07:10:14   (  70.10,  68.75) 02/14/2023   07:11:02  (  70.10,  68.68)    2.75                48
 02/14/2023   08:00:56   ( -70.02,-123.80) 02/14/2023   08:00:31  ( -70.04,-123.78)    2.37                25
 02/16/2023   22:36:41   ( -71.04,  15.70) 02/16/2023   22:37:47  ( -70.94,  18.17)   90.19                66
 02/16/2023   23:27:09   (  70.09,-175.47) 02/16/2023   23:27:28  (  70.08,-175.47)    0.94                19
 02/17/2023   00:17:51   ( -69.99,  -8.01) 02/17/2023   00:16:58  ( -69.96,  -8.00)    3.53                53
 02/19/2023   14:53:21   ( -70.18, 132.84) 02/19/2023   14:54:27  ( -70.16, 132.90)    2.95                66
 02/19/2023   15:44:05   (  70.07, -59.68) 02/19/2023   15:43:54  (  70.05, -59.61)    3.09                11
 02/19/2023   16:34:40   ( -69.60, 108.33) 02/19/2023   16:33:29  ( -69.67, 107.48)   33.42                71
 02/22/2023   07:10:16   ( -70.11,-111.30) 02/22/2023   07:10:53  ( -70.09,-111.32)    2.73                37
 02/22/2023   08:01:00   (  70.00,  56.18) 02/22/2023   08:00:20  (  69.98,  56.17)    2.79                40
 02/24/2023   22:36:34   (  70.41,-163.32) 02/24/2023   22:37:45  (  70.29,-162.76)   24.86                71
 02/24/2023   23:27:11   ( -70.05,   4.56) 02/24/2023   23:27:17  ( -70.07,   4.55)    2.51                 6
 02/25/2023   00:17:55   (  69.94, 172.03) 02/25/2023   00:16:44  (  69.96, 172.04)    1.71                71