Advanced two-way satellite frequency transfer by carrier-phase and carrier-frequency measurements

8th Symposium on Frequency Standards and Metrology 2015

Fujieda, Miho^1 ; Gotoh, Tadahiro^1 ; Amagai, Jun^1

National Institute of Information and Communications Technology, 4-2-1 Nukui-kitamachi, Koganei, Tokyo

184-8795, Japan^1

关键词: Analog-to-digital;    Arbitrary waveform generator;    Carrier-phase measurement;    Frequency resolutions;    Measurement accuracy;    Measurement resolution;    Measurement system;    Two-way satellites;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012036/pdf
DOI  :  10.1088/1742-6596/723/1/012036

来源: IOP

【 摘 要 】

Carrier-phase measurement is one of the ways to improve the measurement resolution of two-way satellite frequency transfer. We introduce two possible methods for carrier-phase measurement: direct carrier-phase detection identified by Two-Way Carrier-Phase (TWCP) and the use of carrier-frequency information identified by Two-Way Carrier Frequency (TWCF). We performed the former using an arbitrary waveform generator and an analog-to-digital sampler and the latter using a conventional modem. The TWCF measurement using the modem had a resolution of 10-13and the result agreed with that obtained by GPS carrier-phase frequency transfer in a 1500 km baseline. The measurement accuracy may have been limited by the poor frequency resolution of the modem; however, the TWCF measurement was able to improve the stability of conventional two-way satellite frequency transfer. Additionally, we show that the TWCP measurement system has the potential to achieve a frequency stability of 10-17.