Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 25.  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)
 10/26/2025   15:18:45   ( -70.10, 126.63) 10/26/2025   15:19:20  ( -70.07, 126.67)    3.26                35
 10/26/2025   16:09:29   (  69.96, -65.85) 10/26/2025   16:08:47  (  69.97, -65.84)    1.27                42
 10/29/2025   06:45:00   (  70.55,  74.39) 10/29/2025   06:46:10  (  70.48,  75.51)   42.28                70
 10/29/2025   07:35:33   ( -70.02,-117.45) 10/29/2025   07:35:46  ( -70.04,-117.49)    2.94                13
 10/29/2025   08:26:18   (  69.93,  49.99) 10/29/2025   08:25:13  (  69.93,  50.00)    0.51                65
 10/31/2025   23:01:42   (  70.11,-169.12) 10/31/2025   23:02:42  (  70.13,-169.10)    2.43                60
 10/31/2025   23:52:23   ( -69.99,  -1.62) 10/31/2025   23:52:12  ( -70.02,  -1.62)    3.49                11
 11/01/2025   00:42:58   (  69.38, 166.58) 11/01/2025   00:41:48  (  69.41, 165.19)   54.62                70
 11/03/2025   15:18:32   (  70.10, -53.32) 11/03/2025   15:19:08  (  70.08, -53.27)    2.98                36
 11/03/2025   16:09:13   ( -69.98, 114.19) 11/03/2025   16:08:38  ( -69.98, 114.22)    0.84                35
 11/06/2025   06:44:48   ( -70.75,-105.85) 11/06/2025   06:45:57  ( -70.66,-104.16)   62.74                69
 11/06/2025   07:35:21   (  70.05,  62.56) 11/06/2025   07:35:33  (  70.05,  62.59)    1.28                12
 11/06/2025   08:26:02   ( -69.92,-129.92) 11/06/2025   08:25:03  ( -69.95,-129.92)    3.40                59