AnnualReport-1925 — Page 191

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- F 13

Time Signals by Radio-Telegraphy.-In addition to the time signals given by the Time Ball, and on the radio mast, signals are broadcast at 10h and 21h by radio telegraphy via Stonecutters. Particulars of the programme are given in Government Notifications No. 359 of 13.6.24 and No. 637 of 14.11.24.

The following table gives particulars of the time-signals received by radio telegraphy during the year.

Station Time of Emission No. of observations Mean difference. (H.K. slow.) Pearl Harbour 8 a.m. 101 0h 0m 0.79s * Nauen 8 a.m. 84 0.64 † Nauen 8 a.m. 135 0.64 Malabar 9 a.m. 172 0.59 Funabashi 10 a.m. 101 0.59 Manila 8 p.m. 150 0.84 * Bordeaux 4 p.m. 37 0.30

* International Code.
† Rhythmic Signals.

Simultaneous observations of the Bordeaux rhythmic Time Signals by radio were made by the Royal Observatory, Greenwich, and this Observatory on 13 occasions, between September 3rd and November 1st, 1924. A comparison of the adopted times of receipt at Greenwich and Hongkong has been made possible by the courtesy of the Astronomer Royal, and the longitude as redetermined by this means is 7h 36m 41.25s (East of Greenwich). This value will be used from January 1st, 1926, in place of 7h 36m 41.86s determined by Commander Green of the U. S. Navy in 1881.

Transit Instrument.—Routine transit and level observations were made by the Chinese computers throughout the year.

The Collimation and Azimuth determinations and occasional transit observations were made by the Chief and First Assistants.

The number of observations in the years 1924 and 1925 was as follows:

1924 1925 Transits 1447 1375 Level determinations 864 702 Azimuth determinations 69 54 Collimation determinations 66 54

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- F 13 Time Signals by Radio-Telegraphy.-In addition to the time signals given by the Time Ball, and on the radio mast, signals are broadcast at 10h and 21h by radio telegraphy via Stonecutters. Particulars of the programme are given in Government Notifications No. 359 of 13.6.24 and No. 637 of 14.11.24. The following table gives particulars of the time-signals received by radio telegraphy during the year. Station Time of Emission No. of observations Mean difference. (H.K. slow.) Pearl Harbour 8 a.m. 101 0h 0m 0.79s * Nauen 8 a.m. 84 0.64 † Nauen 8 a.m. 135 0.64 Malabar 9 a.m. 172 0.59 Funabashi 10 a.m. 101 0.59 Manila 8 p.m. 150 0.84 * Bordeaux 4 p.m. 37 0.30 * International Code. † Rhythmic Signals. Simultaneous observations of the Bordeaux rhythmic Time Signals by radio were made by the Royal Observatory, Greenwich, and this Observatory on 13 occasions, between September 3rd and November 1st, 1924. A comparison of the adopted times of receipt at Greenwich and Hongkong has been made possible by the courtesy of the Astronomer Royal, and the longitude as redetermined by this means is 7h 36m 41.25s (East of Greenwich). This value will be used from January 1st, 1926, in place of 7h 36m 41.86s determined by Commander Green of the U. S. Navy in 1881. Transit Instrument.—Routine transit and level observations were made by the Chinese computers throughout the year. The Collimation and Azimuth determinations and occasional transit observations were made by the Chief and First Assistants. The number of observations in the years 1924 and 1925 was as follows: 1924 1925 Transits 1447 1375 Level determinations 864 702 Azimuth determinations 69 54 Collimation determinations 66 54
Baseline (Original)
- F 13 Time Signals by Radio-Telegraphy.-In addition to the time signals given by the Time Ball, and on the radio mast, signals are broadcast at 10h and 21h by radio telegraphy via Stonecutters. Particulars of the programme are given in Government Notifi- cations No. 359 of 13.6.24 and No. 637 of 14.11.24. 1 The following table gives particulars of the time-signals received by radio telegraphy during the year. Station. Time of Emission. No. of observations. Mean difference. (H.K. slow.) h S · Pearl Harbour 8 a.m. 101 0.79 * Nauen 8 a.m. 84 0.64 † Nauen 8 a.m. 135 0.64 Malabar 9 a.m. 172 0.59 10 a.m. Funabashi 101 0.59 8 p.m. Manila 11 a.m. 150 0.84 * Bordeaux 4 p.m. 37 0.30 * International Code. † Rhythmic Signals. Simultaneous observations of the Bordeaux rhythmic Time Signals by radio were made by the Royal Observatory, Greenwich, and this Observatory on 13 occasions, between September 3rd and November 1st, 1924. A comparison of the adopted times of receipt at Greenwich and Hongkong has been made possible by the courtesy of the Astronomer Royal, and the longitude as redetermined by this means is 7h 36m 41.25s (East of Greenwich). This value will be used from January 1st, 1926, in place of 7h 36m 41.86s determined by Conmander Green of the U. S. Navy in 1881. Transit Instrument.—Routine transit and level observations were made by the Chinese computers throughout the year. The Collimation and Azimuth determinations and occasional transit observations were made by the Chief and First Assistants. The number of observations in the years 1924 and 1925 was as follows: 1924. 1925. Transits.... 1447 1375 Level determinations 864 702 Azimuth determinations 69 54 Collimation determinations... 66 54
2026-05-07 09:08:08 · Baseline
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- F 13

Time Signals by Radio-Telegraphy.-In addition to the time signals given by the Time Ball, and on the radio mast, signals are broadcast at 10h and 21h by radio telegraphy via Stonecutters. Particulars of the programme are given in Government Notifi- cations No. 359 of 13.6.24 and No. 637 of 14.11.24.

1

The following table gives particulars of the time-signals received by radio telegraphy during the year.

Station.

Time of Emission.

No. of observations.

Mean difference. (H.K. slow.)

h

S

· Pearl Harbour

8 a.m.

101

0.79

* Nauen

8 a.m.

84

0.64

† Nauen

8 a.m.

135

0.64

Malabar

9 a.m.

172

0.59

10 a.m.

Funabashi

101

0.59

8 p.m.

Manila

11 a.m.

150

0.84

* Bordeaux

4

p.m.

37

0.30

* International Code.

† Rhythmic Signals.

Simultaneous observations of the Bordeaux rhythmic Time Signals by radio were made by the Royal Observatory, Greenwich, and this Observatory on 13 occasions, between September 3rd and November 1st, 1924. A comparison of the adopted times of receipt at Greenwich and Hongkong has been made possible by the courtesy of the Astronomer Royal, and the longitude as redetermined by this means is 7h 36m 41.25s (East of Greenwich). This value will be used from January 1st, 1926, in place of 7h 36m 41.86s determined by Conmander Green of the U. S. Navy

in 1881.

Transit Instrument.—Routine transit and level observations were made by the Chinese computers throughout the year.

The Collimation and Azimuth determinations and occasional transit observations were made by the Chief and First Assistants.

The number of observations in the years 1924 and 1925 was as follows:

1924.

1925.

Transits....

1447

1375

Level determinations

864

702

Azimuth determinations

69

54

Collimation determinations...

66

54

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