Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 12.  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   07:10:15   (  70.15,  68.67) 02/14/2023   07:11:00  (  70.14,  68.74)    3.02                45
 02/14/2023   08:00:56   ( -70.01,-123.79) 02/14/2023   08:00:30  ( -70.03,-123.79)    1.81                26
 02/16/2023   22:36:39   ( -70.93,  15.88) 02/16/2023   22:37:46  ( -70.84,  18.03)   78.70                67
 02/16/2023   23:27:09   (  70.08,-175.46) 02/16/2023   23:27:25  (  70.08,-175.45)    0.24                16
 02/17/2023   00:17:51   ( -69.99,  -8.00) 02/17/2023   00:16:55  ( -69.97,  -7.98)    2.47                56
 02/19/2023   14:53:20   ( -70.12, 132.93) 02/19/2023   14:54:23  ( -70.13, 132.87)    2.49                63
 02/19/2023   15:44:04   (  70.01, -59.59) 02/19/2023   15:43:50  (  70.02, -59.64)    2.17                14
 02/19/2023   16:34:38   ( -69.49, 108.49) 02/19/2023   16:33:27  ( -69.52, 107.31)   46.16                71
 02/22/2023   07:10:16   ( -70.10,-111.28) 02/22/2023   07:10:46  ( -70.13,-111.23)    3.42                30
 02/22/2023   08:01:00   (  70.00,  56.19) 02/22/2023   08:00:13  (  70.01,  56.25)    3.29                47
 02/24/2023   22:36:29   (  70.14,-162.90) 02/24/2023   22:37:40  (  70.13,-162.96)    2.67                71
 02/24/2023   23:27:11   ( -70.04,   4.58) 02/24/2023   23:27:10  ( -70.02,   4.52)    3.00                 1
 02/25/2023   00:17:51   (  69.72, 172.36) 02/25/2023   00:16:39  (  69.79, 171.85)   21.35                72