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Time Transfer at Very Low Frequency by Carrier Phase Code Manipulation

E. T. Zhukov, B. F. Babaykin, A. S. Batura, P. V. Beliankin, D. V. Philippov

Transactions of IAA RAS, issue 55, 3–9 (2020)

Keywords: very low frequency (VLF), Navy radio stations, time transfer, time markers, carrier phase manipulation

Abstract

Basic aspects of improving the existing method of very low frequency (VLF) time transfer used by Russian NAVY radio stations [1] are considered. The existing time transfer method of carrier transfer series resolution for high accuracy phase measurement with phase ambiguity resolving and amplitude modulation of one of them by low frequency (LF) time marker impulses. The main innovation aims of this new method is reducing the time transfer session duration, broadcasting additional data (current time and UTC-UT1 time difference), and providing interference robust VLF time transfer. Reducing the time transfer session duration is achieved by optimizing the duration of session components and pauses among them and using full reformatted 3 min duration phase modulated LF pulse sequence. The duration of the present-day LF time marker pulse program is 14…19 min. The phase modulated radio call sign, current time and UTC-UT1 time difference broadcast in 1 min duration sequence. Full duration of the time transfer is reduced from 30…41 min to 13 min. The new LF phase modulated pulse program is more robust to interference. The additional data transfer is provided. The novelty of the proposed solutions consists in transferring time markers, time and other necessary information by carrier phase manipulation. The units of transmitting and receiving apparatus realizing the method improved are developed, produced and successfully tested.

Citation

Text

BibTeX

RIS

E. T. Zhukov, B. F. Babaykin, A. S. Batura, P. V. Beliankin, D. V. Philippov. Time Transfer at Very Low Frequency  by Carrier Phase Code Manipulation // Transactions of IAA RAS. — 2020. — Issue 55. — P. 3–9.

@article{zhukov2020,
  abstract = {Basic aspects of improving the existing method of very low frequency (VLF) time transfer used by Russian NAVY radio stations [1] are considered. The existing time transfer method of carrier transfer series resolution for high accuracy phase measurement with phase ambiguity resolving and amplitude modulation of one of them by low frequency (LF) time marker impulses. 
The main innovation aims of this new method is reducing the time transfer session duration, broadcasting additional data (current time and UTC-UT1 time difference), and providing interference robust VLF time transfer.
Reducing the time transfer session duration is achieved by optimizing the duration of session components and pauses among them and using full reformatted 3 min duration phase modulated LF pulse sequence. The duration of the present-day LF time marker pulse program is 14…19 min. The phase modulated radio call sign, current time and UTC-UT1 time difference broadcast in 1 min duration sequence. 
Full duration of the time transfer is reduced from 30…41 min to 13 min. The new LF phase modulated pulse program is more robust to interference. The additional data transfer is provided. The novelty of the proposed solutions consists in transferring time markers, time and other necessary information by carrier phase manipulation. The units of transmitting and receiving apparatus realizing the method improved are developed, produced and successfully tested.},
  author = {E.~T. Zhukov and B.~F. Babaykin and A.~S. Batura and P.~V. Beliankin and D.~V. Philippov},
  doi = {10.32876/ApplAstron.55.3-9},
  issue = {55},
  journal = {Transactions of IAA RAS},
  keyword = {very low frequency (VLF), Navy radio stations, time transfer, time markers, carrier phase manipulation},
  pages = {3--9},
  title = {Time Transfer at Very Low Frequency  by Carrier Phase Code Manipulation},
  url = {http://iaaras.ru/en/library/paper/2071/},
  year = {2020}
}

TY  - JOUR
TI  - Time Transfer at Very Low Frequency  by Carrier Phase Code Manipulation
AU  - Zhukov, E. T.
AU  - Babaykin, B. F.
AU  - Batura, A. S.
AU  - Beliankin, P. V.
AU  - Philippov, D. V.
PY  - 2020
T2  - Transactions of IAA RAS
IS  - 55
SP  - 3
AB  - Basic aspects of improving the existing method of very low frequency
(VLF) time transfer used by Russian NAVY radio stations [1] are
considered. The existing time transfer method of carrier transfer
series resolution for high accuracy phase measurement with phase
ambiguity resolving and amplitude modulation of one of them by low
frequency (LF) time marker impulses.   The main innovation aims of
this new method is reducing the time transfer session duration,
broadcasting additional data (current time and UTC-UT1 time
difference), and providing interference robust VLF time transfer.
Reducing the time transfer session duration is achieved by optimizing
the duration of session components and pauses among them and using
full reformatted 3 min duration phase modulated LF pulse sequence.
The duration of the present-day LF time marker pulse program is 14…19
min. The phase modulated radio call sign, current time and UTC-UT1
time difference broadcast in 1 min duration sequence.   Full duration
of the time transfer is reduced from 30…41 min to 13 min. The new LF
phase modulated pulse program is more robust to interference. The
additional data transfer is provided. The novelty of the proposed
solutions consists in transferring time markers, time and other
necessary information by carrier phase manipulation. The units of
transmitting and receiving apparatus realizing the method improved
are developed, produced and successfully tested.
DO  - 10.32876/ApplAstron.55.3-9
UR  - http://iaaras.ru/en/library/paper/2071/
ER  -