Download e-book for iPad: Aerospace navigation systems by Alexander V. Nebylov, Joseph Watson

By Alexander V. Nebylov, Joseph Watson

ISBN-10: 111916303X

ISBN-13: 9781119163039

ISBN-10: 1119163048

ISBN-13: 9781119163046

ISBN-10: 1119163064

ISBN-13: 9781119163060

ISBN-10: 1119163072

ISBN-13: 9781119163077

Compiled through major experts, Aerospace Navigation platforms is a compendium of chapters that current smooth plane and spacecraft navigation equipment in keeping with updated inertial, satellite tv for pc, map matching and different tips recommendations. starting from the sensible to the theoretical, this e-book covers navigational purposes over quite a lot of aerospace automobiles together with airplane, spacecraft and drones, either remotely managed and working as self sufficient vehicles.  It presents a finished heritage of basic concept, the utilisation of newly-developed concepts, contains the main advanced and complicated kinds of technical innovation at present to be had and provides a imaginative and prescient for destiny advancements. satellite tv for pc Navigation platforms (SNS), lengthy variety navigation platforms, brief variety navigation platforms and navigational screens are brought, and lots of different unique subject matters comprise Radio Navigation structures (RNS), Inertial Navigation platforms (INS), Homing structures, Map Matching and different correlated-extremalsystems, and either  optimum and sub-optimal filtering in built-in navigation systems.

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4) 33 Satellite Navigation Systems 5. 5) í z ï p p p 2 ïhn = sin f - d n 1 - e , if fn > 4 or fn < - 4 î n ( ) 6. Evaluating the convergence of the obtained results if fn - fs < e f and hn - hs < e h then f = fn , h = hn , and the algorithm stops here. else fs = fn , d s = d n , hs = hn , and go back to the step 4. As a remark, the quick convergence of the algorithm depends on the choice of the particular latitude update expression ϕn. 4. As described in Zhu (1994), in addition to the previously described algorithm (the greater the required accuracy, the higher the number of iterations), there are several closed‐form solutions for the geodetic latitude ϕ and altitude h with respect to the Cartesian coordinates.

Hence, a GPS satellite makes two revolutions around the Earth in a sidereal day, but in terms of a solar day of 24 h, each satellite is in the same position in the sky about 4 min earlier each day. Several notations are used to refer to GPS satellites. , B3 stands for satellite #3 on orbit B). The second notation is that of the US Air Force: the Satellite Vehicle Number (SVN) and Navstar satellite number, for example, SVN 2 refers to satellite 2. The third notation indicates a satellite by the unique pseudorandom (PRN) code generator on board a satellite, for example, PRN 5.

Though precise characterization of the gravity field can be accomplished using extensive look‐up tables, for the vast majority of inertial navigation applications the closed‐form models are sufficiently accurate. 5 Computational Errors As discussed earlier in this chapter, inertial navigation algorithms require a variety of numerical methods including transcendental function approximation and numerical integration. When strapdown systems were being developed in the 1970s, computational power was limited, and the approximations needed to achieve real‐time operation had a nontrivial impact on system performance.

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Aerospace navigation systems by Alexander V. Nebylov, Joseph Watson


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