Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 5.  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)
 12/06/2022   07:48:00   (  70.09,  59.50) 12/06/2022   07:48:23  (  70.10,  59.45)    2.10                23
 12/06/2022   08:38:24   ( -70.04,-133.02) 12/06/2022   08:37:52  ( -70.04,-133.00)    0.91                32
 12/09/2022   08:18:31   (  70.16,  51.79) 12/09/2022   08:19:16  (  70.14,  51.78)    2.93                45
 12/09/2022   09:08:54   ( -70.06,-140.65) 12/09/2022   09:08:45  ( -70.08,-140.67)    2.46                 9
 12/09/2022   09:59:30   (  69.55,  27.41) 12/09/2022   09:58:19  (  69.59,  26.29)   43.41                71
 12/12/2022   08:49:00   (  70.19,  44.14) 12/12/2022   08:50:07  (  70.20,  44.15)    1.80                67
 12/12/2022   09:39:24   ( -70.12,-148.37) 12/12/2022   09:39:37  ( -70.10,-148.37)    3.24                13
 12/12/2022   10:30:07   (  70.00,  19.13) 12/12/2022   10:29:04  (  69.99,  19.12)    1.96                63
 12/15/2022   09:19:42   (  70.86,  35.45) 12/15/2022   09:20:50  (  70.75,  37.24)   66.45                68
 12/15/2022   10:09:54   ( -70.14,-156.00) 12/15/2022   10:10:29  ( -70.15,-156.02)    0.72                35
 12/15/2022   11:00:37   (  70.05,  11.46) 12/15/2022   10:59:56  (  70.03,  11.47)    1.31                41
 12/15/2022   11:50:46   ( -69.16,-179.87) 12/15/2022   11:49:39  ( -69.21, 177.99)   84.93                67
 12/18/2022   10:40:23   ( -70.16,-163.64) 12/18/2022   10:41:20  ( -70.18,-163.69)    2.47                57
 12/18/2022   11:31:05   (  70.05,   3.85) 12/18/2022   11:30:47  (  70.06,   3.79)    2.80                18
 12/18/2022   12:21:30   ( -69.98, 171.34) 12/18/2022   12:20:17  ( -69.96, 171.28)    3.11                73