The Navigation Equations

Kayton, Myron

doi:10.1002/9780470172704.ch2

Cited by 17 publications

(35 citation statements)

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“…The higher measurement errors are caused by the signal selection in a dual carrier frequency localizer system. The proposed systems demodulate both CRS signal and CLR signal instead selecting based on the stronger carrier signals called "capture-principal" method [2]. Finally, the measurement mode selection should be built-in to reduce the effect on the receiver output in the dual carrier frequency localizer system.…”

Section: ) Test With Rohdeandschwarz Cms57 Signal Generatormentioning

confidence: 99%

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An implementation of portable ILS Localizer signal receiver using SDR

Leosrisook¹,

Pongpheaw²,

Horapong³

2014

2014 14th International Symposium on Communications and Information Technologies (ISCIT)

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This paper presents an ILS Localizer signal receiver implementation based on Software Defined Radio (SDR) platform using GNU Radio software and USRP hardware. Two algorithms of signal analysis in discrete-time domain and discrete-frequency domain technique are proposed in this paper to measure the Difference in Depth of Modulation (DDM) and Sum of Depth of Modulation (SDM) of radio reception. The envelope detector in discrete-time method had successfully detected the peak envelope value of the AM signals which were needed to calculate for the modulation index. Also, a comparative method in discrete-frequency domain based on the Goertzel algorithm had efficiently provided the magnitude of the selected frequency components, which subsequently were used to calculate for the modulation index. These two presented methods are individually evaluated by comparing their measured DDM and SDM against two avionics ILS signal generators. Test results show the effectiveness of the receiver system and the possibility of future SDR development in avionics area.

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Section: ) Test With Rohdeandschwarz Cms57 Signal Generatormentioning

confidence: 99%

“…One of the most essential navigation systems of an aircraft is the classical Instrument Landing System or ILS [2][3][4] developed since 1939. It is composed of three subsystems: the localizer (LOC), glide slope (GS), and marker beacons (MKR).…”

Section: Introductionmentioning

confidence: 99%

An implementation of portable ILS Localizer signal receiver using SDR

Leosrisook¹,

Pongpheaw²,

Horapong³

2014

2014 14th International Symposium on Communications and Information Technologies (ISCIT)

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“…A-135 The presented system is tightly coupled as it uses one centralized Kalman filter and treats INS and TACAN/ALT subsystem as sensors [3,4]. The system consists of three navigation devices and an algorithm of joint data processing, which contains a complementary extended Kalman filter (CEKF) [1][2][3][4][5][6]. The error updater receives INS errors from CEKF, accumulates them and stores the results.…”

Section: Closed-loop Ins/tacan/alt Positioning Systemmentioning

confidence: 99%

“…Similar advantages can be gained in integrated positioning systems composed of INS and other than GNSS receiver radiotechnical devices. The presented in this paper INS/TACAN/ALT positioning system, composed of INS, Tactical Air Navigation System (TACAN) [5] and altimeter (ALT) [5], is an example of such an alternative solution.…”

Section: Introductionmentioning

confidence: 99%

Closed-Loop INS/TACAN/ALT Positioning System

Kaniewski

2008

Acta Phys. Pol. A

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The paper presents a design of aircraft integrated positioning system, composed of INS, TACAN and altimeter (ALT). This paper describes a modified, closed-loop version of INS/TACAN/ALT system and compares it to the previous design. The system is integrated according to the scheme of compensation with feed-backward INS correction and it employs a complementary extended Kalman filter. The paper includes chosen results of simulations obtained for the open-loop and closed-loop INS/TACAN/ALT systems and discusses advantages of the new design.

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“…The performance results described in this paper were obtained using an alpha-beta filter which (1) removes data at the filter input which ex-ceeds 150-foot outlier rejection window and replaces them with values equal to the outlier limit; (2) replaces missing data samples with the last range estimate.…”

Section: "mentioning

confidence: 99%

Guidance Accuracy Considerations for the Microwave Landing System Precision DME

Kelly

LaBERGE²

1980

Navigation

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The microwave landing system (mls), developed by the FAA under a joint DOT/FAA, DOD, and NASA program is designed for extended requirements in volumetric coverage, guidance accuracy, and integrity to meet the increasing needs of aviation. It is to be a common civil‐military system and provide a level of operations and equipments suitable for all classes of users. Integral to the Microwave Landing System concept is the Distance Measuring Equipment (DME) which measures range to touchdown. It must satisfy to the maximum extent possible, approach and landing operational requirements for all user aircraft (CTOL, STOL, and VTOL). These requirements dictate aircraft range and range rate measurements with an accuracy at least an order of magnitude more precise than those needed for conventional terminal DME application. This precision DME system (called the PDME) must: (1) satisfy the CTOL Category II decision height and Category III flare maneuver accuracy requirements (100 feet, 2 sigma) when combined with the appropriate elevation data, and (2) for VTOL applications provide accurate range (±40 feet, 2 sigma) and range rate information (±2 knots 2 sigma) to permit IFR decelerated approaches to within 500‐foot range of hover. These specifications must be satisfied in the presence of large signal attenuation caused by ground multipath interference and signal time‐of‐arrival errors induced by lateral multipath (hangars, etc.).

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The Navigation Equations

Cited by 17 publications

References 0 publications

An implementation of portable ILS Localizer signal receiver using SDR

An implementation of portable ILS Localizer signal receiver using SDR

Closed-Loop INS/TACAN/ALT Positioning System

Guidance Accuracy Considerations for the Microwave Landing System Precision DME

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