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| A quality evaluation method of airborne gravity survey based on statistics of discrepancies between measurements at intersection points |
| Zuo-Xi JIANG1,2, Hong ZHANG3, Jin-Hong QU1,2, Zhi-Bo WANG1, Xin WANG1, Peng WANG1,2 |
1. China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China
2. Key Laboratory of Airborne Geophysics and Remote Sensing Geology,Ministry of Land and Resources,Beijing 100083,China
3. Economy and Management College,Beijing Information Science & Technology University,Beijing 100192,China; |
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Abstract A kind of quality evaluation method in airborne gravity survey is proposed in this paper.The accuracy of the flight and survey line is quantified by calculating the root mean square of discrepancies between measurements at intersection points of survey line and all tie lines.Using this method,data of three survey areas measured by GT-1/2A gravimeter were analyzed,and the statistical distribution of the accuracy of flight and survey lines were obtained.This paper tries to provide a new method and evaluation indexes for quality control procedures in airborne gravity acquisition projects.
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Received: 27 March 2017
Published: 04 June 2018
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| <0.8 | 0.8
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1.0 | 1.0
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1.2 | 1.2
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1.4 | 1.4
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1.6 | 1.6
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1.8 | 1.8
|
2.0 | 2.0
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2.2 | 2.2
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2.4 | 2.4
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2.6 | 2.6
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2.8 | 2.8
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3.0 | 3.0
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3.2 | >3.2 | 总计 | | 架次频率 | 0 | 26 | 36 | 19 | 16 | 8 | 7 | 2 | 1 | 3 | 2 | 0 | 1 | 0 | 121 | | 占比/% | 0 | 21.5 | 29.8 | 15.7 | 13.2 | 6.6 | 5.8 | 1.7 | 0.8 | 2.5 | 1.7 | 0 | 0.8 | 0 | 100 |
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| <0.2 | 0.2
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0.3 | 0.3
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0.4 | 0.4
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0.5 | 0.5
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0.6 | 0.6
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0.7 | 0.7
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0.8 | 0.8
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0.9 | 0.9
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1.0 | >1.0 | 总计 | | 架次频率 | 0 | 5 | 14 | 38 | 30 | 20 | 12 | 1 | 1 | 0 | 121 | | 占比/% | 0 | 4.1 | 11.6 | 31.4 | 24.8 | 16.5 | 9.9 | 0.8 | 0.8 | 0 | 100 |
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| <0.6 | 0.6
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0.8 | 0.8
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1.0 | 1.0
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1.2 | 1.2
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1.4 | 1.4
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1.6 | 1.6
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1.8 | 1.8
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2.0 | 2.0
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2.2 | 2.2
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2.4 | 2.4
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2.6 | 2.6
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2.8 | 2.8
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3.0 | 3.0
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3.2 | 3.2
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3.4 | >3.4 | 总计 | | 测线频率 | 0 | 16 | 95 | 125 | 77 | 44 | 34 | 29 | 12 | 6 | 6 | 7 | 4 | 2 | 1 | 0 | 458 | | 占比/% | 0 | 3.5 | 20.7 | 27.3 | 16.8 | 9.6 | 7.4 | 6.3 | 2.6 | 1.3 | 1.3 | 1.5 | 0.9 | 0.4 | 0.2 | 0 | 100 |
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| <0.2 | 0.2
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0.3 | 0.3
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0.4 | 0.4
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0.5 | 0.5
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0.6 | 0.6
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0.7 | 0.7
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0.8 | 0.8
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0.9 | 0.9
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1.0 | 1.0
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1.1 | 1.1
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1.2 | 1.2
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1.3 | 1.3
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1.4 | 1.4
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1.5 | >1.5 | 总计 | | 测线频率 | 0 | 17 | 77 | 113 | 113 | 75 | 29 | 23 | 7 | 2 | 1 | 0 | 0 | 1 | 0 | 458 | | 占比/% | 0 | 3.7 | 16.8 | 24.7 | 24.7 | 16.4 | 6.3 | 5.0 | 1.5 | 0.4 | 0.2 | 0 | 0 | 0.2 | 0 | 100 |
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| <0.6 | 0.6
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0.8 | 0.8
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1.0 | 1.0
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1.2 | 1.2
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1.4 | 1.4
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1.6 | 1.6
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1.8 | >1.8 | 总计 | | 架次频率 | 0 | 13 | 24 | 17 | 17 | 3 | 1 | 0 | 75 | | 占比/% | 0 | 17.3 | 32.0 | 22.7 | 22.7 | 4.0 | 1.3 | 0 | 100 |
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| <0.2 | 0.2
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0.3 | 0.3
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0.4 | 0.4
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0.5 | 0.5
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0.6 | 0.6
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0.7 | 0.7
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0.8 | 0.8
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0.9 | >0.9 | 总计 | | 架次频率 | 2 | 4 | 11 | 27 | 11 | 14 | 5 | 1 | 0 | 75 | | 占比/% | 2.7 | 5.3 | 14.7 | 36.0 | 14.7 | 18.7 | 6.7 | 1.3 | 0 | 100 |
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| <0.4 | 0.4
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0.6 | 0.6
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0.8 | 0.8
|
1.0 | 1.0
|
1.2 | 1.2
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1.4 | 1.4
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1.6 | 1.6
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1.8 | 1.8
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2.0 | 2.0
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2.2 | 2.2
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2.4 | >2.4 | 总计 | | 测线频率 | 4 | 39 | 115 | 148 | 115 | 78 | 46 | 26 | 6 | 2 | 2 | 0 | 581 | | 占比/% | 0.7 | 6.7 | 19.8 | 25.5 | 19.8 | 13.4 | 7.9 | 4.5 | 1.0 | 0.3 | 0.3 | 0 | 100 |
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| <0.2 | 0.2
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0.3 | 0.3
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0.4 | 0.4
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0.5 | 0.5
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0.6 | 0.6
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0.7 | 0.7
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0.8 | 0.8
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0.9 | 0.9
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1.0 | 1.0
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1.1 | 1.1
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1.2 | 1.2
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1.3 | 1.3
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1.4 | >1.4 | 总计 | | 测线频率 | 14 | 59 | 115 | 135 | 92 | 64 | 51 | 21 | 10 | 11 | 5 | 3 | 1 | 0 | 581 | | 占比/% | 2.4 | 10.2 | 19.8 | 23.2 | 15.8 | 11.0 | 8.8 | 3.6 | 1.7 | 1.9 | 0.9 | 0.5 | 0.2 | 0 | 100 |
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| 测区编号 | 测区地域 | 测量
仪器 | 飞行平台 | 测线方向 | 飞
行
地
| 滤
波
窗
| 架
次
数 | 测
线
条
数 | 切
割
线
条
数 | 切割
线间
| 测线
| 交叉点
最大高
| 交叉点
异常最
大不符
| 水平调
整后交
叉点异
常最大
| 架次
原始
最大
| 架次水
平调整
后最大
| 测线
原始
最大
| 测线水
平调整
后最大
| | A1 | 海
域 | GT-1A
(SN09) | CESSNA208 | SN | 220 | 100 | 132 | 344 | 28 | 10 | 1 | 36.0 | 8.26 | 3.97 | 2.16 | 0.82 | 2.50 | 1.42 | | A2 | 陆
地 | GT-2A
(SN015) | CESSNA208B | SN | 220 | 100 | 121 | 458 | 69 | 5 | 1 | 49.9 | 8.73 | 5.63 | 3.00 | 0.94 | 3.21 | 1.43 | | A3 | 陆
地 | GT-2A
(SN013) | CESSNA208B | SN | 220 | 100 | 75 | 581 | 24 | 10 | 0.5 | 48.7 | 6.50 | 4.69 | 1.70 | 0.83 | 2.33 | 1.32 |
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| 线号 | 原始精度/mGal | 水平调整后精度/mGal | 原始交叉点最大异
常不符值/mGal | 水平调整后交叉点最
大异常不符值/mGal | | 统计值 | 是否达标
(≤3.5) | 统计值 | 是否达标
(≤1.5) | 统计值 | 是否达标
(≤9.0) | 统计值 | 是否达标
(≤6.0) | | 5320 | 3.09 | √ | 2.29 | × | 10.39 | × | 7.65 | × | | 5321 | 1.43 | √ | 0.66 | √ | 3.25 | √ | 2.35 | √ | | 5470 | 1.40 | √ | 0.67 | √ | 4.01 | √ | 1.66 | √ | | 5471 | 1.29 | √ | 0.67 | √ | 4.01 | √ | 2.09 | √ | | 5480 | 1.18 | √ | 0.72 | √ | 4.24 | √ | 2.30 | √ | | 5500 | 1.11 | √ | 0.65 | √ | 3.66 | √ | 1.92 | √ | | 5510 | 1.54 | √ | 0.88 | √ | 6.49 | √ | 3.27 | √ |
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