Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 12 11.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2021   06:09:18   ( -70.20, -95.67) 12/11/2021   06:08:22  ( -70.18, -95.70)    3.14                56
 12/11/2021   06:58:46   (  70.04,  71.75) 12/11/2021   06:59:06  (  70.05,  71.80)    1.90                20
 12/11/2021   07:48:28   ( -69.27,-121.67) 12/11/2021   07:49:35  ( -69.29,-119.76)   74.90                67
 12/13/2021   22:25:47   ( -70.13,  20.12) 12/13/2021   22:25:12  ( -70.12,  20.17)    2.89                35
 12/13/2021   23:15:14   (  70.03,-172.39) 12/13/2021   23:15:57  (  70.05,-172.41)    2.30                43
 12/16/2021   13:52:40   (  70.55, -31.03) 12/16/2021   13:51:29  (  70.56, -32.07)   38.42                71
 12/16/2021   14:42:16   ( -70.11, 135.97) 12/16/2021   14:42:04  ( -70.11, 135.96)    0.51                12
 12/16/2021   15:31:43   (  70.00, -56.54) 12/16/2021   15:32:48  (  69.99, -56.55)    1.48                65
 12/19/2021   06:09:15   (  70.19,  84.33) 12/19/2021   06:08:14  (  70.20,  84.29)    1.45                61
 12/19/2021   06:58:45   ( -70.09,-108.19) 12/19/2021   06:58:56  ( -70.11,-108.26)    3.58                11
 12/19/2021   07:48:21   (  69.48,  58.62) 12/19/2021   07:49:30  (  69.46,  60.01)   54.20                69
 12/21/2021   22:25:44   (  70.16,-159.83) 12/21/2021   22:25:05  (  70.15,-159.85)    1.76                39
 12/21/2021   23:15:14   ( -70.06,   7.65) 12/21/2021   23:15:47  ( -70.06,   7.60)    2.11                33
 12/24/2021   13:52:33   ( -70.89, 149.49) 12/24/2021   13:51:25  ( -70.94, 147.34)   78.49                68
 12/24/2021   14:42:12   (  70.12, -44.01) 12/24/2021   14:41:55  (  70.10, -44.01)    2.45                17
 12/24/2021   15:31:42   ( -70.03, 123.49) 12/24/2021   15:32:37  ( -70.01, 123.45)    2.04                55