Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 5 9.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2021   02:04:50   (  68.53, 147.09) 05/11/2021   02:05:24  (  68.56, 147.09)    3.06                34
 05/11/2021   02:55:32   ( -68.45, -45.48) 05/11/2021   02:54:54  ( -68.45, -45.41)    2.71                38
 05/13/2021   17:31:09   ( -68.95,  94.98) 05/13/2021   17:32:20  ( -68.86,  95.70)   30.31                71
 05/13/2021   18:21:47   (  68.51, -97.12) 05/13/2021   18:21:51  (  68.52, -97.07)    2.23                 4
 05/13/2021   19:12:28   ( -68.37,  70.39) 05/13/2021   19:11:22  ( -68.36,  70.36)    1.28                66
 05/16/2021   09:48:00   ( -68.61,-148.79) 05/16/2021   09:48:51  ( -68.60,-148.74)    1.92                51
 05/16/2021   10:38:43   (  68.44,  18.75) 05/16/2021   10:38:19  (  68.42,  18.69)    2.56                24
 05/16/2021   11:29:10   ( -67.53,-172.81) 05/16/2021   11:28:02  ( -67.60,-174.64)   78.15                68
 05/19/2021   01:14:29   (  69.43, 158.52) 05/19/2021   01:15:36  (  69.32, 160.43)   75.47                67
 05/19/2021   02:04:56   ( -68.53, -32.92) 05/19/2021   02:05:18  ( -68.56, -32.92)    3.04                22
 05/19/2021   02:55:40   (  68.42, 134.53) 05/19/2021   02:54:45  (  68.43, 134.58)    2.83                55
 05/21/2021   17:31:10   (  68.61, -84.58) 05/21/2021   17:32:14  (  68.61, -84.61)    1.00                64
 05/21/2021   18:21:52   ( -68.51,  82.87) 05/21/2021   18:21:44  ( -68.51,  82.91)    1.65                 8
 05/21/2021   19:12:28   (  67.97,-109.13) 05/21/2021   19:11:17  (  68.05,-110.00)   37.10                71