Survey line land-sea elevation transfer method employing integrated shipborne gravity and GNSS
A technology for carrying gravity and surveying lines, which is used in measurement devices, mapping and navigation, altitude/horizontal measurement, etc. The effect of wide collection coverage, low cost, and improved accuracy
Active Publication Date: 2015-04-29
SHANDONG UNIV OF SCI & TECH
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[0019] The optimization method for the elevation transfer of islands and reefs in the above-mentioned technical scheme needs to integrate the gravity data of land, coastal zone and islands and reefs because it constructs a gravity quasi-geoid numerical model, so the required observation data is huge and expensive. In the process of data unification, new errors will be introduced; more importantly, this method needs to construct an accurate local gravity quasi-geoid with a relatively small range, that is to say, it cannot achieve long-distance cross-sea elevation transfer
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[0115] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0116] The line-measuring type land-sea elevation transmission method integrating ship-borne gravity and GNSS of the present invention utilizes the integrated ship-mounted gravimeter and GNSS technology to realize the data collection of line-of-sea elevation transmission, which includes the following steps:
[0117] In the first step, the orthometric height h of the elevation datum point A on land is known A , using the commonly used GNSS method to measure its geodetic height H A and measure the gravity anomaly Δg with a gravimeter A ;
[0118] The second step is to use the integrated ship-mounted gravimeter and the GNSS ship to make a round trip along the route between the known point A on land and the point B to be measured on the island (reef), and measure the gravity data Δg on the passing survey line i (i=1,2,…) and GNSS three-dimensional coordinates
[0119...
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The invention relates to a survey line land-sea elevation transfer method employing integrated shipborne gravity and GNSS. The method comprises the following steps: roundtripping land and a sea island (reef) once by virtue of an integrated shipborne gravimeter and a GNSS from a long distance; carrying out marine gravimeteric survey and GNSS measurement along a course of a vessel in the once roundtripping process, so as to finish high-precision survey line sea-crossing elevation datum transfer data collection; carrying out correction and noise-reduction treatment on basic data, and deriving a formula for calculating high-precision course sea plumb line deviation along the measuring line gravity data by the least square collocation method; and achieving the marine survey line elevation datum unification and accurate elevation transfer by using the astronomical leveling principle. Compared with the prior art, the survey line land-sea elevation transfer method has the beneficial effects of relatively small required observation data quantity, relatively low required cost, small error and high precision, and is suitable for long-distance sea-crossing elevation transfer.
Description
technical field [0001] The invention relates to a long-distance cross-sea elevation reference transmission method, in particular to a survey-line type land-sea elevation transmission method integrating ship-borne gravity and GNSS. Background technique [0002] Elevation, as basic geospatial information, plays a pivotal role in national economic construction and national defense construction. [0003] Marine economy, port engineering, marine transportation, marine aquaculture, marine fishing, marine resource exploration and development, submarine engineering, coastal zone engineering, marine environmental protection, marine disaster monitoring, island (reef) development and protection, etc. all require rich elevation data , it is necessary to unify the vertical datum of land and sea charts to build a unified land and sea spatial information datum. [0004] In order to unify the elevation datum of land and islands, land-sea elevation joint measurement should be carried out. ...
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Login to View More IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 郭金运王建波刘新孔巧丽朱金山
Owner SHANDONG UNIV OF SCI & TECH