Based on the navigation satellite system, sea-based Joint Precision Approach and Landing System (JPALS) represents the direction of future development of the shipboard aircraft auto-landing technology. The current researches on sea-based JPALS navigation algorithm is based on dual-frequency measurements, which has the problem of long geometric-free filtering period and stringent requirement of the accuracy of pseudo-range measurements. So in this dissertation, prototype algorithms for sea-based JPALS based on triple-frequency measurements of Beidou Navigation Satellite System (BDS) is proposed. The results of 7 days simulation analysis at sea area of China Diaoyu islands show that it only takes 8 min of geometric-free filtering time for this three-frequency navigation algorithm to achieve the required performance of sea-based JPALS by using the B1/B2 Wide-Lane and B1/B3 Medium-Lane combination for triple-frequency geometric-free ambiguity pre-filtering algorithm. And the availability performance of BDS triple-frequency sea-based JPALS can be enhanced greatly even if the accuracy of pseudo-range measurements is relaxed to as much as 50 cm. And another advantage of this BDS triple-frequency sea-based JPALS algorithm is, when the accuracy of the carrier phase measurements is within 0.7 cm, it can fix the ambiguity at 3 n mile away from the aircraft carrier, which leads to the earlier application of high precision carrier phase measurements to the BDS sea-based JPALS integrity monitoring.
WANG Guanlong
,
CUI Xiaowei
,
LU Mingquan
. Triple-frequency sea-based JPALS fault-free navigation algorithm for BDS[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017
, 38(12)
: 321340
-321340
.
DOI: 10.7527/S1000-6893.2017.321340
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