Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 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)
 12/14/2022   17:40:21   ( -70.65,  90.58) 12/14/2022   17:41:31  ( -70.53,  91.76)   45.22                70
 12/14/2022   18:30:57   (  70.12,-101.27) 12/14/2022   18:31:04  (  70.11,-101.22)    2.36                 7
 12/14/2022   19:21:29   ( -70.01,  66.25) 12/14/2022   19:20:34  ( -69.99,  66.25)    1.86                55
 12/17/2022   14:04:24   (  70.15, -34.68) 12/17/2022   14:05:16  (  70.17, -34.68)    2.65                52
 12/17/2022   14:54:57   ( -70.07, 132.79) 12/17/2022   14:54:46  ( -70.06, 132.79)    1.52                11
 12/17/2022   15:45:31   (  69.45, -58.97) 12/17/2022   15:44:21  (  69.51, -60.32)   52.94                70
 12/20/2022   09:38:07   (  71.10,  30.44) 12/20/2022   09:39:13  (  70.99,  32.98)   92.72                66
 12/20/2022   10:28:23   ( -70.10,-160.61) 12/20/2022   10:28:57  ( -70.11,-160.69)    3.06                34
 12/20/2022   11:19:07   (  70.03,   6.81) 12/20/2022   11:18:24  (  70.00,   6.80)    3.56                43
 12/23/2022   06:01:54   ( -70.36, -94.36) 12/23/2022   06:03:06  ( -70.31, -93.96)   16.21                72
 12/23/2022   06:52:34   (  70.10,  73.35) 12/23/2022   06:52:35  (  70.08,  73.36)    2.56                 1
 12/23/2022   07:43:07   ( -69.98,-119.12) 12/23/2022   07:42:05  ( -69.98,-119.15)    1.51                62
 12/26/2022   02:26:00   (  70.14, 139.93) 12/26/2022   02:26:46  (  70.14, 139.90)    1.32                46
 12/26/2022   03:16:34   ( -70.05, -52.57) 12/26/2022   03:16:16  ( -70.04, -52.61)    1.84                18
 12/26/2022   04:07:03   (  69.23, 115.94) 12/26/2022   04:05:55  (  69.26, 113.97)   77.76                68