精密時期装量の開発
Contents
1. We x RK B LH 1981 Circular D 179 Charles Kirkland 1964 Loran Coordinate Computation Informal manuscript report No N 1 64 Marine Sciences Department U S Naval Oceanographic Office Coast Guard 1980 Radionavigation Systems PP 30 37 Department of Transportation 1981 LR 707D 1981 C LRS 1282. Rb 0 1zs C C UTC C 0 1s C C C
3. C T C
4. 0 C 0 C CHS 100km 0 6 0 9us 0 C DEVELOPMENT OF PRECISE TIME DEVICE 125 C 4 1 2 S
5. C TDk Ps Pz TD AT AT TD m 8 C TDr C Co USNO Corr 2 C C C AT TD Ty TDr CotUSNO Corr 3 Pz Pi AT Pz
6. C UTC IWO TAO UTC TAO 3 3 0 1s 2
7. UTC 2 C UTC USNO UTC ED Emission Delay 2 C 1 2
8. 0 1zs C DEVELOPMENT OF PRECISE TIME DEVICE 123 3
9. TDR C TD TD TDs 3 AT TD TDr Co 3 0 1 99 9zs 100zs GRI GRI C C GRI TDo USNO TDc TDo TDc TCo TDc
10. 1 LOL v 6 DEVELOPMENT OF PRECISE TIME DEVICE 129 TAO JJY C UTC We TAO UTC TAO JHD 56 10 20
11. USNO UTC USNO UTC LCi C C UTC BIH USNO TAO RRL C C 1981 8 23 TAO RRL UTC USNO UTC TAO UTC RRL HAH 0 1s LC HE
12. TDo TDc gt 0 TDo TDc lt 0 3 4 0 C O C 3
13. SHO 57 2 2 TAO UTC TAO 6 17 C TAO Austron2000 C C 20m Olus 1 56 10 20 C 9970M LCwo 1 JHD 2 TAO LCiwo JHD 1213 590km 4051 7zs LCmwo TAO 1217 673km 4065 3xs Figure 2 TDr 80006 3 80006 3
14. C 2000km 4 4 0 C 5 128 FUSAKICHI ONO 1 C
15. Di FUSAKICHI ONO USNO M Clock Pi Mark at null second 1 gt gt i S Reference pulse i S 2 at Master i ee 1 Signal at 1 Se receiving site H a 3 i Pern Signal output i i X in Receiver A 4 i i i i C k Ps Simulator pulse h i i i i H t yer 5 i 1 i 1 H 3 a aa z 1 lt Bgl Measurement value of sibel pric Counter Ce g yee Signal output i N in Receiver G K Dc l Local Clock Py 7 Figure 2 Timing chart of new type time comparison system 2 1 5 C TD TDm C Ps WISE Colt C C
16. AT Pz Pi AT TD Tm 6 C USNO Corr Pi a ul USNO M Clock 1 Mark at null second 1 gt k USNO Correction t 1 i N 7z y Y Reference pulse receiving site at Master H i z Yu Propagation delay i woos 1 Me H 1 1 Se Signal at if a 3 t 1 x z gt Receiver delay Signal output in Receiver 4 gt 1 7 7 N i i wee 1 I gt C Cycle correction 1 h 5 kTD Figure 1 Timing chart of conventional type time comparison system I Local Clock rw 0 1zs 9 0 2zs C
17. UTC USNO UTC TAO 5 5us UTC USNO UTC RRL 5 0us UTC USNO UTC LCiwo 2 5us C UTC TA0 UTC LCwo 2 8us UTC RRL UTC LCiwo 1 0us n 5 C C 134 FUSAKICHI ONO JHD TAORRL USNO 23 August 1981 LC Portable Clock Published by TAO amp RRL i Tea ee 1 28 LC i i LC Iwo ot i l IO LC L l LC Iwo Published by TAO ae ae Published by RRL 7 425 OTE R 0 me gp Published by USNO Unit S Figure 5 Contradict of Loran C emited time by lwojima
18. C 5zs C C S N 0 1s 7 1 D 1 2 o AL gy Ag 8 tan b a tan 7 1 x cos sin Ai sinf2 cosfi cos rcos Az 7 2 x x 71 180 7 3 Ao sinfi sinf2 7 4 Bo sin i sin 2 7 5 P a b x sinx 4 1 cos 7 6 Q a b x sinx 4 1 cos 7 7
19. 0 5 1 0 5 10us 1 1 2 C 3 C 4 5 C 1 Tm 3 C TD
20. 18 58 3 REPORT OF HYDROGRAPHIC RESEARCHES No 18 March 1983 DEVELOPMENT OF PRECISE TIME DEVICE Fusakichi Ono Received 1982 September 20 Abstract A time device since such a unit did not exist has been newly developed with the ability to permit exact synchronization of the times of two clocks installed at very remote sites to 0 1s The conventional time device has a weak point in relation to the difficulty of defining the delays of signals in the whole receiving system including the cycle correction of sampling points in comparison with clocks using Loran C waves In a clock comparison based on the developed time device a Loran C pseudo signal which has a fixed relation to the clock signal is generated at the receiving station to the clocks are indirectly compared with each other through the generated signal by an ordinary hyperbolic navigation receiver Therefore the signal delays in the receiving system are cancelled since the two signals to be compared pass through the same receiving system and thus the possibility of error does not exist To check the accuracy of the developed time device the time of the related new device concerned was set to UTC based on the writer s method and the time set point was compared three times with one of UTC TAO Tokyo Astronomical Observatory As a result it was verified that the
21. UTC BIH TAO 4 0zs RRL 2 7s USNO 9 2xs TAO 4 0zs TA0 LCwo 4066 8zs 4065 3s 57 1 62 1 60km 0 0 0 5 4123 9 4127 9 4 0us RRL USNO TAO 5 TAO RRL 1 3zs HOM C TAO RRL USNO 5gs
22. 40000zs 99800zs 1 2 Slave 1 Slave 2 LOP 13000 1us 86800 0us 2 1 mv rms 1 V rms ATT 10db 756 30us 200us 2 EB 9 gs TTL 10gs loxs 1 20zs ae AC100V 20VA Cs 44 C LR707D CRM EmA 4 2 3 O lus 3 1 ATT 30db GRI TTL 13 5gs GRI 22 5s _ 4m 22 59 0 50 AC100V 50VA 5 KDM 3980 5MHz TTL 0 1Zs ER 1 10
23. UTC UTC UTC UTC TAO UTC USNO BIH UTC BIH UTC i UTC BIH BIH UTC i C UTC BIH UTC i ofi Circular D C TAO 5zs 5us TAO C
24. 1zs C C DEVELOPMENT OF PRECISE TIME DEVICE 135 9 flo
25. Emission moratorium on the Iwojima Station 8 UTC BIH CC DEY CC DEVELOPMENT OF PRECISE TIME DEVICE 133 C LC wo ET RRL UTC TAO Time and Latitude BULLETINS RRL STANDARD FREQUENCY AND TIME SERVICE BULLETIN UTC
26. 4051 7 4051 7 5 05 03 Co 50 0 20 0 TD 84008 5 s 84038 3us Ls 29 8 I TD 84038 34s 84008 54s E 29 8zs 29 8xs UTC JHD al UTC TA0 PC1 UTC JHD 57 1 29 8 5 30m UTC UTC TAO UTC TAO PC1 27 1 UTC TAO UTC JHD 0 2us TAO UTC TAO LCiwo UTC TAO 4128 4 TAO t 4065 3 9 57 1 Oo 0 5 60km UTC TAO LCiwo 5 2us UTC JHD C UTC LCiwo 130 FUSAKICHI ONO UTC TA0 UTC JHD UTC TAO LCiwo TAO JHD 5 0us TAO JHD 2 57
27. 1 IC BCD BY 0 1zs 999999 94s C 3 Et 10KPPS C GRI 0 1zs 100zs C C C C C CE
28. 1980 C 55 86 90 1980 C 26 3 12 Radio Research Laboratory 1981 Standard Frequncy and Time Service Bulletin Annual Report Tokyo Astromical Observatory 1981 Time and Latitude Bulletins Vol 55 No 3
29. b C C 100KHz USNO UTC Cs
30. 100 1000 10000 Z CGRI GRI C GRI DEVELOPMENT OF PRECISE TIME DEVICE 127 0 1zs C Digital Switch 7 unit Phase Comparator 1710 17 10110 1710 1710 1210 1710 Reset P Comparator 1710 1710 1710 pps Clock Shift l pps l us step Auto Manual One Shot Multi Internal Oscilator 10 MHz GRI Loran C Acloov 99489 Figure 4 Block diagram of the Clock Device 4 5 MHz 2 0 14s 10 7 IC
31. 2 2 C 7930M LCmar 1 SHO 2 LCmar SHO 2034 002km 6791 0zs LCmar TAO 1876 711km 6265 8us TDR 58931 0u s T 6791 0 0 0 Co 20 0 TD 65702 0us lt UTC SHO UTC TAOPC1 UTC SHO 30 20us UTC TAO UTC TAOPC1 30 27 UTC TA0 UTC SHO 0 07 us TAO UTC TAO UTC LCmar UTC TAO 6328 53 TAO 6265 8 I Ta 00d 92 0 7 74km UTC TAO LCMAR 4 9zs 3 57 6 17 C 9970M LCLwo 1 2 TAO LCwo TAO 1217 673km 4065 3zs TDr 85351 5us 4065 3 0 4 60km Co 20 0 TD 89397 2zs UTC JHD DEVELOPMENT OF PRECISE TIME DEVICE 131 UTC TAO UTC JHD 2 2us TA0 UTC
32. D ax AoP BoQ 7 8 4 FUSAKICHI ONO a b D o HERE A WGS 72 a 6378 135km b 6356 755km L a b km 7 8 km CHAS rz 78 4 1972 T D V aD E y D 7 9 V 0 2996912 km us a 0 002155 us km 0 4076 us y 38 67 us km 7 9 us or Ar ez Az Z 9 cos sin g sin ez cos x sin cos g2 7 10 Z 406 sin A1 A2 20 7 11 Z 360 sin Ai A2 0 WGS 72 3 Table 1 Loan C Stations Station Longitude Latitude Emission delay ae mee a ie 9970 M Iwojima 141 1930 3 24 4803 6 N 0 0 9970 W 153 5853 2 24 1707 9 N 15283 94 Marcus 7930 M 0 0 9970 X 143 4309 2 42 4437 1 N 36685 12 Hokkaido Xx 7930 X 18526 27 9970 Y 128 08 56 4 26 3625 0 N 59463 18 Okinawa 3x 7930 Y 38702 77 9970 Z Yap 138 0955 0 9 3245 8 80746 79 7930 z Jo P 56814 78 JHD Tokyo 139 4558 1 E 35 3953 1 N SHO Simosato 135 56 11 9 33 3439 1 N to o TAO Mitaka 139 3211 5 35 4031 5 N
33. desired setting accuracy of 0 1 s was satisfactorily cleared This time device was fabricated for international co observation based on laser geodetic servey of the laser geodetic satellite LAGEOS by which the Maritime Safety Agency originally started to prove the relationship between the local and world geodetic systems since 1982 Currently the time device is performing in a stable manner at the Shimosato Hydrographic Observatory Key words Time determination Time comparison of Loran C wave International Clock comparison Marine Research Laboratory 122 FUSAKICHI ONO 1 56 HERAT OP EKK b
34. TAO LCwo UTC TAO 4129 9 TAO z 4065 3 I 57 1 92 0 4 UTC TAO LCiwo 7 1us TAO JHD C 7 1 2 2 4 9 TAO JHD C 5 xs 4 3 THES Ae 3 K C 0 1zgs UTC 0 14s
35. tandard wave Reciever Pu aun requenc Standard Figure 3 Block diagram of a Clock and Clock comparison system Rb NEATOMIC Rb 1007H HARA 10MHz 5MHz 1MHz 100 kHz 75Q 1 X10 2 X10 rms 0 4X10 50C 0 7X107 C 0 lt 1X10 10 lt 1 X10 360 lt 1X107 30 25 1 3X109 C FIELD 0 1000 10 48 70W KPM 3910 126 FUSAKICHI ONO 10MHz 5MHz 5MHz 1Vrms 50QX2 TTL3009 Load 1MHz TTL 5VPP 509 1ms TTL 3 0 1zs 999999 94s O lus C GRI 200us 99900us 100zs TTL AC100V 32VA DC24V 17W 3 C LRS 128
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