Results for: Real Instituto y Observatorio de la Armada
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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Spain, ROA (Real Instituto y Observatorio de la Armada)
Time scale difference , Time scale difference : -1 s to 1 s
Local clock vs UTC
Absolute expanded uncertainty : 4 ns
Time interval measurement
Averaging time : 5 days
Fractional part of modulo 1 s, integer part can be provided
Approved on 26 July 2019
Institute service identifier : ROA 1.1.2
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 3.2E-15 Hz/Hz to 1.0E-13 Hz/Hz
U = 1E-13/t1/2 U in Hz/Hz, t in s
Dual mixer time difference
Averaging time : 1 s to 1000 s
Amplitude : >1 V
Frequency instability measurement.
Approved on 26 July 2019
Institute service identifier : ROA 2.4.1
Frequency , Frequency : 1 Hz
Remote frequency standard
Relative expanded uncertainty : 2.5E-14 Hz/Hz
GPS common view comparisons
Averaging time : 1 day
Institute service identifier : ROA 2.1.2
Time scale difference , Time scale difference : -1 s to 1 s
Remote clock vs UTC
Absolute expanded uncertainty : 8 ns
GPS common view comparisons
Averaging time : 5 days
Fractional part of modulo 1 second difference, integer part can be provided also
Approved on 26 July 2019
Institute service identifier : ROA 1.2.2
Frequency , Frequency : 10 MHz
Local frequency standard
Relative expanded uncertainty : 1.5E-14 Hz/Hz
Phase/time measurement
Averaging time : 1 day
Approved on 26 July 2019
Institute service identifier : ROA 2.1.1
Time interval , Time interval : 1.00E-8 s to 1 s
Pulse width source
Absolute expanded uncertainty : 1 ns
Time interval counter
Slew rate : > 0.1 V/ns
Approved on 26 July 2019
Institute service identifier : ROA 3.2.2
Time interval , Time interval : 1.00E-7 s to 1 s
Period meter
Absolute expanded uncertainty : 1 ns
Pulse generator
Slew rate : > 0.1 V/ns
Approved on 26 July 2019
Institute service identifier : ROA 3.3.1
Frequency , Frequency : 1.00E4 Hz to 8.00E7 Hz
Frequency meter
Relative expanded uncertainty : 2.0E-11 Hz/Hz
Direct measurement
Averaging time : 1000 s
For sine wave signal.
Institute service identifier : ROA 2.3.2
Time interval , Time interval : 1.00E-9 s to 1 s
Delay source
Absolute expanded uncertainty : 1 ns
Time interval counter
Slew rate : > 0.5 V/ns
Institute service identifier : ROA 3.2.4
Time scale difference , Time scale difference : -1 s to 1 s
Local clock vs UTC(ROA)
Absolute expanded uncertainty : 1 ns
Time interval measurement
Pulse amplitude : >1 V
Slew rate : > 1 V/ns
Load impedance : 50 Ω
Trigger level : 1 V
Fractional part of modulo 1 s, integer part can be provided
Approved on 26 July 2019
Institute service identifier : ROA 1.1.1
Time interval , Time interval : 1.00E-9 s to 1 s
Rise/fall time source
Absolute expanded uncertainty : 1 ns
Time interval counter
Slew rate : > 0.1 V/ns
Approved on 26 July 2019
Institute service identifier : ROA 3.2.1
Frequency , Frequency : 5 MHz
Local frequency standard
Relative expanded uncertainty : 1.5E-14 Hz/Hz
Phase/time measurement
Averaging time : 1 day
Approved on 26 July 2019
Institute service identifier : ROA 2.1.1
Time interval , Time interval : 1.00E-8 s to 1 s
Pulse width meter
Absolute expanded uncertainty : 1 ns
Pulse generator
Slew rate : > 0.1 V/ns
Approved on 26 July 2019
Institute service identifier : ROA 3.4.2
Time scale difference , Time scale difference : -1 s to 1 s
Remote clock vs UTC
Absolute expanded uncertainty : 1.1E1 ns
GPS common view comparisons
Prediction time : 20 days
Fractional part of modulo 1 s, integer part can be provided
Approved on 26 July 2019
Institute service identifier : ROA 1.2.2
Time interval , Time interval : 1.00E-9 s to 1000 s
Period source
Absolute expanded uncertainty : 1 ns
Time interval counter
Slew rate : > 0.1 V/ns
Approved on 26 July 2019
Institute service identifier : ROA 3.1.1
Frequency , Frequency : 1 Hz to 1.00E4 Hz
Frequency meter
Relative expanded uncertainty : 2.0E-11 Hz/Hz to 2.0E-7 Hz/Hz
U = 2E-07/f U in Hz/Hz, f in Hz
Direct measurement
Averaging time : 1000 s
For sine wave signal.
Approved on 26 July 2019
Institute service identifier : ROA 2.3.2
Frequency , Frequency : 10 MHz
Remote frequency standard
Relative expanded uncertainty : 2.5E-14 Hz/Hz
GPS common view comparisons
Averaging time : 1 day
Approved on 26 July 2019
Institute service identifier : ROA 2.1.2
Time scale difference , Time scale difference : -1 s to 1 s
Remote clock vs UTC(ROA)
Absolute expanded uncertainty : 6 ns
GPS common view comparisons
Averaging time : 1 day
Fractional part of modulo 1 s, integer part can be provided
Approved on 26 July 2019
Institute service identifier : ROA 1.2.1
Time scale difference , Time scale difference : -1 s to 1 s
Local clock vs UTC
Absolute expanded uncertainty : 8 ns
Time interval measurement
Prediction time : 20 days
Fractional part of modulo 1 s, integer part can be provided
Approved on 26 July 2019
Institute service identifier : ROA 1.1.2
Frequency , Frequency : 1.00E5 Hz to 1.30E9 Hz
General frequency source
Relative expanded uncertainty : 2.0E-12 Hz/Hz
Frequency measurement
Averaging time : 1000 s
For sine wave signal.
Approved on 26 July 2019
Institute service identifier : ROA 2.2.1

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