Author Affiliations
1Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China2Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, Chinashow less
Fig. 1. Diagram of laser ranging system based on array detection
Fig. 2. Multi-channel laser ranging data statistic
Fig. 3. Main echo matching O-C plot. (a) Each channel, (b) all channels
Fig. 4. Segmental signal identification (3/8) and signal identification results (b)
Fig. 5. Cyclic fitting filtering results (a) and fitting residual plot (b)
Fig. 6. Echo photon distribution diagram of laser ranging data (a) and time offset diagram between channels (b)
Fig. 7. Fitting residual histogram statistics and multi-peaks Gaussian fitting results. (a) Each channel, (b) channel 13
Fig. 8. [in Chinese]
Fig. 8. Cross-correlation sequence of each channel and standard channel (channel 14) & Gaussian fitting results. (a) Cross-correlation sequence of each channel and standard channel & Gaussian fitting results, (b) cross-correlation sequence of channel 13 and its maximum value
Fig. 9. Fitting residual histogram statistics before (a) and after (b) correction(all channels)
Fig. 10. [in Chinese]
Fig. 10. 10571 data preprocessing results. (a) Original data, (b) signal identification results, (c) histogram statistics of fitting residual after correction
Fig. 11. hy2a data preprocessing results. (a) Original data, (b) signal identification results, (c) histogram statistics of fitting residual after correction
Fig. 11. [in Chinese]
Code
(name)
| Date | RMS before correction/m | RMS after correction/m | Accuracy improvement/m | Remarks | 10517 | 2019-04-15 | 1.898 | 1.759 | 13.9 | 1st pass | 10517 | 2019-04-15 | 2.115 | 2.046 | 6.9 | 2nd pass | 38355 | 2019-04-15 | 1.883 | 1.809 | 7.4 | | 04139 | 2018-12-01 | 1.514 | 1.491 | 2.3 | | 07364 | 2018-12-01 | 1.807 | 1.756 | 5.1 | | 22237 | 2018-12-01 | 1.174 | 1.048 | 12.6 | | 22285 | 2018-12-01 | 1.488 | 1.468 | 2.0 | | hy2a | 2018-12-01 | 0.861 | 0.780 | 8.1 | | Mean | | | | ~7.2 | |
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Table 1. Correction results of time offset between channels
通道间的时间偏差修正结果
Code
(name)
| Date | RMS after correction/m | RMS further processing/m | Accuracy improvement/cm | Remarks | 10517 | 2019-04-15 | 1.759 | 1.717 | 4.2 | 1st pass | 10517 | 2019-04-15 | 2.046 | 2.039 | 0.7 | 2nd pass | 38355 | 2019-04-15 | 1.809 | 1.794 | 1.5 | | 04139 | 2018-12-01 | 1.491 | 1.489 | 0.2 | | 07364 | 2018-12-01 | 1.756 | 1.646 | 11.0 | | 22237 | 2018-12-01 | 1.048 | 1.030 | 1.8 | | 22285 | 2018-12-01 | 1.468 | 1.435 | 3.3 | | hy2a | 2018-12-01 | 0.780 | 0.746 | 3.4 | | Mean | | | | ~3.2 | |
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Table 2. RMS of further processing
修正后数据处理内符合精度