Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 8.  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)
 01/09/2023   06:45:15   (  70.23,  74.92) 01/09/2023   06:46:26  (  70.22,  75.08)    5.99                71
 01/09/2023   07:35:55   ( -70.03,-117.46) 01/09/2023   07:35:57  ( -70.05,-117.52)    2.92                 2
 01/09/2023   08:26:38   (  69.86,  50.10) 01/09/2023   08:25:25  (  69.89,  49.90)    8.48                73
 01/11/2023   23:02:08   (  70.14,-169.18) 01/11/2023   23:02:55  (  70.16,-169.12)    2.80                47
 01/11/2023   23:52:49   ( -70.00,  -1.65) 01/11/2023   23:52:26  ( -70.00,  -1.72)    2.73                23
 01/14/2023   15:19:01   (  70.07, -53.30) 01/14/2023   15:19:24  (  70.07, -53.36)    2.17                23
 01/14/2023   16:09:43   ( -69.98, 114.15) 01/14/2023   16:08:54  ( -69.97, 114.13)    1.50                49
 01/17/2023   06:45:11   ( -70.22,-105.07) 01/17/2023   06:46:23  ( -70.18,-104.96)    5.57                72
 01/17/2023   07:35:54   (  70.05,  62.49) 01/17/2023   07:35:50  (  70.07,  62.52)    2.10                 4
 01/17/2023   08:26:34   ( -69.85,-129.90) 01/17/2023   08:25:21  ( -69.91,-130.06)    9.08                73
 01/19/2023   23:02:03   ( -70.10,  10.87) 01/19/2023   23:02:51  ( -70.10,  10.81)    2.20                48
 01/19/2023   23:52:47   (  70.00, 178.34) 01/19/2023   23:52:18  (  69.98, 178.29)    2.35                29