ロランCシステムの評価-2 : 南西太平洋における漂泊中の相対精度について
Contents
1. 1 600 1 700 T Table 3 24 C NNSS SD2. 00 1D S N l0uec 10gsec Table 4 CW WY WZ 45 M W 30 M 19 M ZC 10zsec Pair Zon dS us slipped datas 10 us 10 gs 20 us 20 gus 30 pus 30 ps Total W Z Y W ZX W Z Y W Z X W Z X W Z X W Z Y W Z X 1 12 12 4 8 8 W Z 2 14 2 14 12 12 3 18 6 12 18 18 12 4 17 14 17 1 2 3 5 15 9 9 6 6 15 15 6 29 18 20 9 7 2 2 11 9 7 29 19 5 12 9 12 1 10 24 8 13 13 13 13 W Y 9 23 16 2 5 9 7 7 7 21 10 59 46 45 13 1 13 13 14 11 38 7 6 21 32 10 31 32 12 57 51 2 5 35 20 1 6 55 13 13 13 1 12 12 14 31 31 16 15 15 x see Fig 1 W M W in all zones Z Y M Z in 1 3 zones M Y in 4 14 zones
3. x BA D 970 44 81 90 2 02974 42 67 72 3 AREH e MARN e LR 1977 58 41 49 4 1980 51 35 40 5 1971 46 1 8 6 982 35 3 80 81 7 1975 2 30 34 8 1973 7 44 49 9 1968 3B 17 29 44 10 1977 54 6 9 11 09789 LR 777 18
4. NNSS 2 C NNSS NN SS Table 1 C 1 10zsec 10 30zsec 40 60 psec Table 1 The Loran C Fixes by W Y and W Z pairs and the NNSS Fixes in each year No of C Fixes No of NNSS Fixes Odserved year W Y W Z Usual Unusual Total 1979 17 12 14 2 16 1980 29 32 30 3 33 1981 278 151 16 167 Total 324 44 195 21 216 53 1982 21 NNSS 195
5. Table 3 1800 KW and those of Y and Z are 1000 KW 8 1 5 2 S N 20dB 9 E EIx4P 300 E dB E1 300KW dB P KW 8 10 YN 80 W 46dB 61dB S N 20dB Y 1 600 W M 1 700 22
6. WZ WY WZ M ZZ wu 0 2usec SD Y 0 4gsec SD 0 7 usec WZ WZ 3 SD 1J 3 2 2 3 33T 3 0 0 942 0 36058 1350 1400 5 1450 0 0 C i 6 NM 1500 7 9 1550 Distance from Y NM 8 1600 14 1650 12 no 10 NO 1750 iu p e 1550 1500 1450 1400 1350 Distance from W NM Fig 3 Mean distances from transmitting stations W and Y to each receiving zone mean positions of total data and the 68 proba bility circle in each zone Each zone number is the same as shown in Ta
7. A 4 6 J B 79 C 10 14 3 Table 5 NNSS lo Fig 4 A 0 763 0 776 SD 0 731 0 736 1 Total 900 Fig 4 The 68 probability circle in each area which consists of 3 55 zones and the mark is the same as shown in Table 5 53 1982 Table 5 The mean values and standard deviations of difference of latitude departure distance and dys in each area Z 25 Day D D lat NM Dep NM Dist NM dus W dus Y Area Zone or y D NO of Night N ata Mean SD Mean SD Mean SD Mean SD Mean SD qe 30 0 478 0 498 0 020 0 398 0 713 0 353 0 60 1 22 0 12 1 30 A 4 5 6 D 11 0 432 0 350 0 187 0 384 0 625 0 312 0 02 1 28 0 79 1 16 N 19 0 505 0 564 0 139 0 353 0 764 0 364 0 96 1 02 0 27 1 22 T 22 1 044 0 900 0 073 0 635 1 295 0 794 0 69 1 82 0 82 1 96 B 7 8 9 D 8 0 446 0 551 0 085 0 240 0 631 0 408 0 65 0 90 0 03 0 74 N 14 1 386 0 883 0 164 1 761 1 674 0 707 0 71 2 18 1 31 2 25 i053 T 115 0 624 0 810 0 165 0 450 1 003 0 520 0 85 1 44 0 08 1 27 C 12 13 D 36 0 433 0 518
8. NNSS SOM 160 TOSNAV 703 400MHz 1 LORAN LR 777 C 1 NNSS 0 C NNSS M ZZ M W CW M Y Y M 2 Z M W Y OKINAWA M IO JIMA W MARCUS I NORTH PACIFIC OCEAN Z YAP I Observation area MINDANAO Fig l Arrangement of the Loran C stations 9970 chain and the observation area Z YAP I SOUTH WEST PACIFIC OCEAN o 140 145 E Fig 2 Sites of the observation zones NNSS 0 C NNSS
9. 1 500 NNSS 1 77 0 78 NNSS 1 16 6 K C NNSS 10
10. 0 1 lt 0 3 1 2 3 iT X 4 5 NNSS C Fi amp B ENS 19791981 NNSS 20 SA eBRSHH n7CLATGAOR E I 9970 Fig 1
11. C WZ 25 WY 170 NNSS C C NNSS 30 H GMT20 30 08 30 _ 1 V m S N 10dB 1zV m 1 200 1 700 6 800 Table 2 Distances between mean receiving positions and transmittin
12. M 30psec 14 2 5 T 5zsec M W Y 53 1982 23 2 3 10psec WY omo D A H0 M 11 Y 30usec Table 4 Numbers of the Loran C Fixes and the data of slips occurred in 10 gsec steps No of non No of slipped data every 10 Hpsec order 1
13. C i i Table 3 The mean values and standard deviation of difference of latitude departure distance and dys in each zone Bue UE Day D E No of D lat NM Dep NM Dist NM dzs W dzs or Y night N pios Mean SD Mean SD Mean SD Mean SD Mean SD porem 5 0 397 0 135 0 083 0 176 0 440 0 143 0 50 0 64 0 68 0 74 1 D Nil N 5 0 397 0 135 0 083 0 176 0 440 0 143 0 50 0 64 0 68 0 74 T 8 1 181 1 229 0 211 0 390 1 653 0 617 1 20 1 29 1 21 2 50 W Z 2 D Nil N 8 1 181 1 229 0 211 0 390 1 653 0 617 1 20 1 29 1 21 2 50 T 12 0 561 0 540 0 272 0 554 0 917 0 387 0 99 1 69 0 14 2 23 3 D 3 0 640 0 087 0 840 0 07 1 37 N 9 0 534 0 557 0 391 0 514 0 943 0 358 1 34 1 53 0 28 2 38 T 9 0 556 0 494 0 001 0 305 0 699 0 368 0 66 1 07 0 21 1 03 4 D 2 0 225 0 220 0 425 0 00 0 45 N 7 0 653 0 476 0 034 0 284 0 780 0 356 0 86 0 90 0 13 1 04 T 8 0 551 0 660 0 104 20 511 0 871 0 435 0 36 1 56 0 54 1 66 5 D 1 0 260 0 950 0 990 2 10 3 20 N 7 0 593 0 651 0 016 0 379 0 854 0 433 0 71 1 19 0 16 1 26 T 13 0 378 0 410 0 110 0 382 0 625 0 279 0 71 1 17 0 19 1 23 6 D 8 0 503 0 371 0 109 0 319 0 630 0 328 0 24 1 17 0 58 0 93 N 5 0 176 0 387 0 460 0 129 0 616 0 175 1 46 0 68 1 42 0 34 T 11 0 735 0 735 0 031 0 498 0 946 0 659 0 79 1 35 0 28 1 63 7 D 5 0 336 0 656 0 032 0 220 0 584 0 499 0 40 0 95 0 06 0 69 N 6 1 068 0 622 0 030 0 643 1 248 0 622 1 12 1 53 0 47 2 09 T 1 942 0 567 0 143 0 622
14. 0 039 0 505 0 769 0 348 0 13 1 52 0 44 1 37 14 N 79 0 711 0 899 0 258 0 389 1 109 0 549 1 18 1 28 0 08 1 19 T 167 0 653 0 793 0 107 0 478 0 989 0 563 0 78 1 47 0 19 1 41 Total D 55 0 435 0 495 0 050 0 459 0 720 0 357 0 17 1 41 0 45 1 27 N 112 0 761 0 885 0 185 0 467 1 121 0 598 1 08 1 40 0 06 1 45 The dys means the time difference converted from the relative error psec see Fig 1 T means the total of D and N B CJ A 1 5 B C NNSS C 9970 0 772 1 712 Y 1 700 1 500 0 8 0 4
15. 2 043 0 574 1 90 1 66 0 96 2 02 8 D Nil l N 5 1 942 0 567 0 143 0 622 2 043 0 574 1 90 1 66 0 96 2 02 T 6 0 862 0 913 0 443 0 703 1 310 0 742 0 48 2 00 1 72 2 12 W Y 9 D 3 0 630 0 172 0 712 1 07 0 14 N 3 1 092 1 061 1 910 2 06 3 60 T 33 0 548 0 749 0 211 0 445 0 967 0 409 0 92 1 45 0 03 1 29 10 D 11 0 390 0 452 0 090 0 538 0 731 0 342 0 48 1 71 0 14 1 42 N 22 0 627 0 850 0 271 0 375 1 085 0 388 1 14 1 25 0 11 1 21 T 23 0 807 0 912 0 193 0 415 1 144 0 618 1 02 1 53 0 20 1 08 11 D 7 0 510 1 241 0 020 0 458 0 714 0 120 0 21 1 51 0 44 1 02 N 16 0 938 1 055 0 287 0 357 1 332 0 653 1 37 1 40 0 09 1 08 T 31 0 418 0 685 0 101 0 542 0 837 0 498 0 52 1 57 0 07 1 51 12 D 14 0 454 0 308 0 134 0 533 0 711 0 319 0 15 1 48 0 67 1 45 N 17 0 388 0 880 0 294 0 468 0 941 0 586 1 06 1 43 0 43 1 36 T 8 0 629 0 875 0 219 0 326 0 921 0 681 0 93 1 30 0 00 0 35 13 D Nil N 8 0 629 0 875 0 219 0 326 0 921 0 681 0 93 1 30 0 00 0 35 T 20 0 858 1 831 0 133 0 359 1 188 0 403 1 01 1 03 0 18 1 26 14 D 4 0 342 0 098 1 170 0 03 0 50 N 16 0 986 0 656 0 191 0 363 1 192 0 391 1 27 0 96 0 10 1 24 The dps means the time difference converted from the relative error usec see Fig 1 s standard deviation T means the total of D and N 6 Table 2 Zid 5440 610g EUG
16. course and speed In this observation area the mean relative errors were 0 72 nautical miles in day time and 1 12 nautical miles in night time Within 1500 nautical miles distance from the transmitting station there was a mean relative error of 0 8 0 4 nautical miles in night and day In the distance range of 1500 1700 nautical miles a standard position was necessary to carry out correction of the slips which arose with the time difference errors The errors are of the order of 10 psecs on the machine When the corrections were carried out appropriately we were able to fix a suitable position with relative error of less than 1 7 0 8 nantieal miles A C f NNSS
17. Author s Citation NAOSITE Nagasaki Universitys Academic Output SITE HE H7 gt IT Ld U0 00 00 0D0 HHHHHHHHHHHH V53 pp 19 25 1982 Issue Date 1982 08 URL http hdl handl e net 10069 30441 This document is downloaded at 2015 11 05T21 57 14Z http naosite Ib nagasaki u ac jp 53 19 25 1982 aF CYA FH PU KE PEQC 43 U 5 8B Be 19 Evaluation of the Loran C System On the Relative Accuracy while the Ship is Drifting in the South Western Pacific Ocean Hiroshi YOSHIMURA Shigekatsu NAKANE and Masaji GODA The authors evaluated the accuracy of the Loran C System based on measurments of the relative positional error which is defined as the difference between the position fixed by this system 9970 chain and the one fixed by the Navy Navigation Satellite System NNSS The NNSS served to give us highly accurate ship s positions and a number of ships are equipped with its receivers The data were collected during the cruises of the T 8 Kakuyo Maru in the south western Pacific Ocean in each autumn for three years 1979 1981 The measurments were carried ou while the ship was drifting in order to exclude error of INNSS position due to errors in data of the ship s
18. ble 3 The center of each circle shows the mean cal culated Loran C fix by its Tables The mean NNSS Fix in each zone is shown as Symbol 21 1 65 0 762 WY 4 14 L ViR W 0 731 0 735 sec Y 0 730 0 739 sec 27 31 WE EC 1gsec NN SS KR 7 9 0252 0 2 SD t0 4 1 8 7 6 1 5 SD 2 2 lt 3 6 7 Kik 4 14 Fig 2
19. g stations Mean position Dist from master M and Zone secondary stations W Y Z NM lat IN Long E M W Y Z 1 05 32 5 144 26 3 1169 4 1252 0 443 7 2 03 36 0 144 07 6 1282 3 1365 8 503 4 3 02 49 6 145 52 2 1344 4 1370 6 611 2 4 05 29 8 137 55 0 1174 8 1459 0 1384 5 5 04 36 6 137 39 9 1229 7 1510 4 1428 2 6 04 26 2 138 41 2 1231 3 1482 9 1461 1 7 03 58 8 139 23 5 1254 2 1481 8 1503 2 8 03 26 1 141 29 1 1282 0 1445 0 1587 5 9 03 04 3 140 24 4 1304 8 1495 9 1578 2 10 03 26 7 144 28 2 1294 2 1366 2 1676 5 11 03 01 6 143 51 6 1314 7 1403 7 1678 6 12 02 47 2 12 57 7 1324 2 1439 2 1663 9 13 02 40 4 144 19 4 1338 9 1412 3 1711 1 14 02 10 8 141 20 0 1357 3 1515 5 1650 5 The transmitting powers of M and W are see Fig 1 WZ 1 3 3 WY 4 lt 14 11 Table 2 Fig 2
Download Pdf Manuals
Related Search