Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2023   23:51:27   (  69.92, 178.27) 11/19/2023   23:52:14  (  69.94, 178.23)    2.76                47
 11/20/2023   00:42:09   ( -69.82, -14.27) 11/20/2023   00:41:44  ( -69.83, -14.29)    1.35                25
 11/22/2023   15:17:58   ( -70.93, 125.12) 11/22/2023   15:19:04  ( -70.83, 127.76)   97.05                66
 11/22/2023   16:08:25   (  69.93, -65.99) 11/22/2023   16:08:46  (  69.90, -65.95)    3.29                21
 11/22/2023   16:59:06   ( -69.77, 101.56) 11/22/2023   16:58:16  ( -69.80, 101.54)    2.57                50
 11/25/2023   07:34:38   ( -70.00,-117.65) 11/25/2023   07:35:50  ( -70.01,-117.57)    2.92                72
 11/25/2023   08:25:21   (  69.84,  49.90) 11/25/2023   08:25:18  (  69.84,  49.84)    2.19                 3
 11/25/2023   09:16:02   ( -69.68,-142.55) 11/25/2023   09:14:49  ( -69.68,-142.74)    7.37                73
 11/27/2023   23:51:34   ( -69.92,  -1.76) 11/27/2023   23:52:22  ( -69.92,  -1.81)    1.97                48
 11/28/2023   00:42:18   (  69.82, 165.70) 11/28/2023   00:41:49  (  69.81, 165.68)    1.08                29
 11/30/2023   15:18:02   (  70.75, -54.62) 11/30/2023   15:19:09  (  70.68, -52.46)   79.43                67
 11/30/2023   16:08:30   ( -69.90, 114.03) 11/30/2023   16:08:51  ( -69.93, 114.07)    3.28                21
 11/30/2023   16:59:14   (  69.80, -78.51) 11/30/2023   16:58:18  (  69.81, -78.45)    2.76                56