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8 Cards in this Set
- Front
- Back
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Accuracy errors (IMCRED) |
Ionosphere: ToD, season, solar actvty Multipath: terrain reflect/refract signl Receiver: ambient noise difficult to match PRN codes Clock: diff btwn satellite & receiver Ephemeris: gravity affect satellite pos Dillution of precision: next |
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Dillution of precision accuracy |
Greater accuracy where: 1. More satellites available 2. Satellites spaced widely apart |
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WAAS accuracy |
2m
Receivers not req to compute RAIM as FDE capable |
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RAIM requirements for LNAV app |
Must be available ETA +/- 15mins Check on ground & before start App |
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App types & requirements |
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GNSS app alternate selection |
1. WAAS/RAIM integrity exp at ETA 2. 1x prior midpoint to dest, verify RAIM at dest and alt 3. Where satellite app planned both dest & alt, a/d seperated by: - 75nm where both NU or N56° QB & LB - 100nn elsewhere 4. For RNP - no credit for LPV - credit only barometric LNAV/VNAV |
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Augmentation |
RAIM FDE AAIM - uses redundant pos info from multiple sources to provided integrity equivalent to RAIM WAAS - uses ground based station receivers to correct for pos errors - can eliminate all errors except. multipath & receiver LAAS - like WAAS but pos correction sent directly to ac from grnd stn |
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Reqs for traditional |
- along airways/air routes traditional system as backup - if RAIM alert en route blw MEA, advise ATS and climb to continue nav using traditional - for traditional app, GPS can be used in place of DME |
