NavCom Rinex Utility Rev C - Manual (Page 14)

RINEX Utility – Rev C
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The NCT-2000D and NCT-2100D use an adjusted 16-bit integer (U16) in the data to avoid this
confusion. They can handle up to week 65535.
For example, in Figure 4 the GPS Week Number for the Output Start / End times is 1313. To
determine the week/date, subtract 1024 from 1313, which is 290. Then add 290 weeks to 21
August 1999. The result is Sunday 6 March 2005.
GPS Time
The GPS time (seconds into the week) always starts on Sunday morning at 00:00 GMT. Each
24 hour period contains 86,400 seconds. A full week contains 604,800 seconds. Please see the
table below for a breakdown of hourly / daily increments.
Table 2: GPS Time
GMT Sun Mon Tue Wed Thu Fri Sat
0:00:00 0 86400 172800 259200 345600 432000 518400
1:00:00 3600 90000 176400 262800 349200 435600 522000
2:00:00 7200 93600 180000 266400 352800 439200 525600
3:00:00 10800 97200 183600 270000 356400 442800 529200
4:00:00 14400 100800 187200 273600 360000 446400 532800
5:00:00 18000 104400 190800 277200 363600 450000 536400
6:00:00 21600 108000 194400 280800 367200 453600 540000
7:00:00 25200 111600 198000 284400 370800 457200 543600
8:00:00 28800 115200 201600 288000 374400 460800 547200
9:00:00 32400 118800 205200 291600 378000 464400 550800
10:00:00 36000 122400 208800 295200 381600 468000 554400
11:00:00 39600 126000 212400 298800 385200 471600 558000
12:00:00 43200 129600 216000 302400 388800 475200 561600
13:00:00 46800 133200 219600 306000 392400 478800 565200
14:00:00 50400 136800 223200 309600 396000 482400 568800
15:00:00 54000 140400 226800 313200 399600 486000 572400
16:00:00 57600 144000 230400 316800 403200 489600 576000
17:00:00 61200 147600 234000 320400 406800 493200 579600
18:00:00 64800 151200 237600 324000 410400 496800 583200
19:00:00 68400 154800 241200 327600 414000 500400 586800
20:00:00 72000 158400 244800 331200 417600 504000 590400
21:00:00 75600 162000 248400 334800 421200 507600 594000
22:00:00 79200 165600 252000 338400 424800 511200 597600
23:00:00 82800 169200 255600 342000 428400 514800 601200
23:59:59 86399 172799 259199 345599 431999 518399 604799
‡
Example: 518400 = Sat 0:00:00 GMT