[time-nuts] ADEV values of Thunderbolt PPS and OSC error estimates

Mark Sims holrum at hotmail.com
Sat Jan 10 23:25:25 UTC 2009


Here is two sets of ADEV/OADEV data generated from the PPS and OSC error estimates produced by the Thunderbolt. There is a set from a run where the oscillator was disciplined by GPS and a set where the oscillator was undisciplined. The PPS numbers are probably the best ones to use. Trimble's documentation on exactly what the OSC error values are is rather poor and I am just guessing what they mean and how to convert them into something that can be fed into the ADEV code.##  PPS OADEV over 22000 points - sample period=1 secs - disciplined #        1 tau  1.4140e-006 (n=21998)#        2 tau  1.2248e-006 (n=21996)#        5 tau  4.8993e-007 (n=21990)#       10 tau  2.4503e-007 (n=21980)#       20 tau  1.2258e-007 (n=21960)#       50 tau  4.9104e-008 (n=21900)#      100 tau  2.4600e-008 (n=21800)#      200 tau  1.2359e-008 (n=21600)#      500 tau  5.0137e-009 (n=21000)#     1000 tau  2.5688e-009 (n=20000)#     2000 tau  1.2359e-009 (n=18000)#     5000 tau  2.7077e-010 (n=12000)#    10000 tau  5.4669e-013 (n=2000)##  PPS ADEV over 22000 points - sample period=1 secs - disciplined #        1 tau  1.4140e-006 (n=21998)#        2 tau  1.2235e-006 (n=10998)#        5 tau  7.7367e-007 (n=4398)#       10 tau  5.4722e-007 (n=2198)#       20 tau  2.6497e-010 (n=1098)#       50 tau  9.8233e-011 (n=438)#      100 tau  5.6151e-011 (n=218)#      200 tau  3.9024e-011 (n=108)#      500 tau  1.4521e-011 (n=42)#     1000 tau  6.3933e-012 (n=20)#     2000 tau  4.1976e-012 (n=9)###  OSC OADEV over 22000 points - sample period=1 secs - disciplined #        1 tau  2.2969e-007 (n=21998)#        2 tau  1.6255e-007 (n=21996)#        5 tau  1.0351e-007 (n=21990)#       10 tau  7.4928e-008 (n=21980)#       20 tau  5.7408e-008 (n=21960)#       50 tau  4.6799e-008 (n=21900)#      100 tau  3.4445e-008 (n=21800)#      200 tau  1.7323e-008 (n=21600)#      500 tau  7.0268e-009 (n=21000)#     1000 tau  3.6004e-009 (n=20000)#     2000 tau  1.7322e-009 (n=18000)#     5000 tau  3.7961e-010 (n=12000)#    10000 tau  4.1514e-013 (n=2000)##  OSC ADEV over 22000 points - sample period=1 secs - disciplined #        1 tau  2.2969e-007 (n=21998)#        2 tau  1.6263e-007 (n=10998)#        5 tau  1.0336e-007 (n=4398)#       10 tau  7.4706e-008 (n=2198)#       20 tau  5.7006e-008 (n=1098)#       50 tau  4.5848e-008 (n=438)#      100 tau  3.9821e-008 (n=218)#      200 tau  2.8396e-008 (n=108)#      500 tau  1.0394e-010 (n=42)#     1000 tau  5.2360e-012 (n=20)#     2000 tau  2.4501e-012 (n=9)##  PPS OADEV over 22000 points - sample period=1 secs  - undisciplined #        1 tau  7.5658e-010 (n=21998)#        2 tau  5.0045e-010 (n=21996)#        5 tau  2.8665e-010 (n=21990)#       10 tau  1.8127e-010 (n=21980)#       20 tau  1.1774e-010 (n=21960)#       50 tau  6.8339e-011 (n=21900)#      100 tau  4.6184e-011 (n=21800)#      200 tau  4.1377e-011 (n=21600)#      500 tau  7.4192e-011 (n=21000)#     1000 tau  1.0220e-010 (n=20000)#     2000 tau  1.1842e-010 (n=18000)#     5000 tau  1.2073e-010 (n=12000)#    10000 tau  3.7124e-011 (n=2000)##  PPS ADEV over 22000 points - sample period=1 secs - undisciplined#        1 tau  7.5658e-010 (n=21998)#        2 tau  5.1193e-010 (n=10998)#        5 tau  2.9314e-010 (n=4398)#       10 tau  1.8065e-010 (n=2198)#       20 tau  1.1872e-010 (n=1098)#       50 tau  7.2017e-011 (n=438)#      100 tau  4.6293e-011 (n=218)#      200 tau  3.9846e-011 (n=108)#      500 tau  7.2822e-011 (n=42)#     1000 tau  1.0120e-010 (n=20)#     2000 tau  1.1514e-010 (n=9)##  OSC OADEV over 22000 points - sample period=1 secs - undisciplined #        1 tau  3.9644e-009 (n=21998)#        2 tau  1.9671e-009 (n=21996)#        5 tau  7.8264e-010 (n=21990)#       10 tau  3.9313e-010 (n=21980)#       20 tau  1.9801e-010 (n=21960)#       50 tau  7.9931e-011 (n=21900)#      100 tau  4.1369e-011 (n=21800)#      200 tau  2.5506e-011 (n=21600)#      500 tau  2.2498e-011 (n=21000)#     1000 tau  2.0910e-011 (n=20000)#     2000 tau  1.2765e-011 (n=18000)#     5000 tau  7.0420e-012 (n=12000)#    10000 tau  1.5081e-012 (n=2000)##  OSC ADEV over 22000 points - sample period=1 secs - undisciplined #        1 tau  3.9644e-009 (n=21998)#        2 tau  1.9375e-009 (n=10998)#        5 tau  7.9203e-010 (n=4398)#       10 tau  3.8195e-010 (n=2198)#       20 tau  1.8606e-010 (n=1098)#       50 tau  7.7008e-011 (n=438)#      100 tau  3.5703e-011 (n=218)#      200 tau  2.0731e-011 (n=108)#      500 tau  2.1042e-011 (n=42)#     1000 tau  1.9238e-011 (n=20)#     2000 tau  1.4089e-011 (n=9)
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