Changes

On November 28, 2024 at 1:02:02 PM UTC, admin:

Set author of Simulated DLLR data for timespan 1970 - 2021 to Zhang, Mingyue (previously Mingyue Zhang)

Updated description of Simulated DLLR data for timespan 1970 - 2021 from
Differential Lunar Laser Ranging (DLLR) is a new concept which will be implemented at the Table Mountain Observatory of JPL. A DLLR station will measure a lunar reflector at time t1 to get a range measurement. After a short switching interval (e.g., 1.5 min), the same station at time t2 will measure another reflector to get another range. The DLLR observation will be obtained by the difference of the two consecutive range measurements, called lunar range difference. As no actual DLLR data is available now, we did the DLLR simulation based on modifying the LLR simulation software of Hofmann (2017). The simulated DLLR data is simulated according to the real Lunar Laser Ranging (LLR) 28093 normal points from 1970 to 2021 provided by the stations McDonald, MLRS1, MLRS2, OCA, WLRS, MLRO, APOLLO and LURE for the reflectors Apollo 11, Apollo 14, Apollo 15, Lunokhod 1 and 2. The data distribution, the assumed stations and reflectors used for DLLR simulation are the same as those of the real LLR data group. We simulated four DLLR data groups, two with 1.5-minute switching interval, two with 15-minute switching interval. Each switching interval group includes two subgroups with different observation accuracies. One is the same as the LLR range accuracy and another one is 200 times improved based on LLR range accuracy. For this DLLR simulation, the used temperature, pressure, wavelength and humidity of the station are the same for the two measurement time points t1 and t2. The respective columns of the data contain the following information: 1. station CODE 2. measuring time t1 [JD] 3. reflector 1 4. reflector 2 5. range difference [km] 6. accuracy [um] 7. temperature[ Celsius degree] 8. pressure [hPa] 9. wavelength [um] 10. humidity [%] A detailed description of the simulation process and the analysis of the data sets is published as "_Characteristics of differential lunar laser ranging_, Astronomy & Astrophysics, in review, 2022". As the simulated data is still under scientific investigation, the data sets are of a preliminary nature and show work in progress at the Institute of Geodesy at Leibniz University Hannover. ----- Hofmann, F. (2017), _Lunar Laser Ranging – verbesserte Modellierung der Monddynamik und Schätzung relativistischer Parameter_, PhD thesis, Leibniz University Hannover.
to
Differential Lunar Laser Ranging (DLLR) is a new concept which will be implemented at the Table Mountain Observatory of JPL. A DLLR station will measure a lunar reflector at time t1 to get a range measurement. After a short switching interval (e.g., 1.5 min), the same station at time t2 will measure another reflector to get another range. The DLLR observation will be obtained by the difference of the two consecutive range measurements, called lunar range difference. As no actual DLLR data is available now, we did the DLLR simulation based on modifying the LLR simulation software of Hofmann (2017). The simulated DLLR data is simulated according to the real Lunar Laser Ranging (LLR) 28093 normal points from 1970 to 2021 provided by the stations McDonald, MLRS1, MLRS2, OCA, WLRS, MLRO, APOLLO and LURE for the reflectors Apollo 11, Apollo 14, Apollo 15, Lunokhod 1 and 2. The data distribution, the assumed stations and reflectors used for DLLR simulation are the same as those of the real LLR data group. We simulated four DLLR data groups, two with 1.5-minute switching interval, two with 15-minute switching interval. Each switching interval group includes two subgroups with different observation accuracies. One is the same as the LLR range accuracy and another one is 200 times improved based on LLR range accuracy. For this DLLR simulation, the used temperature, pressure, wavelength and humidity of the station are the same for the two measurement time points t1 and t2. The respective columns of the data contain the following information: 1. station CODE 2. measuring time t1 [JD] 3. reflector 1 4. reflector 2 5. range difference [km] 6. accuracy [um] 7. temperature[ Celsius degree] 8. pressure [hPa] 9. wavelength [um] 10. humidity [%] A detailed description of the simulation process and the analysis of the data sets is published as: Zhang, M.; Müller, J.; Biskupek, L. & Singh, V. V. (2022): Characteristics of differential lunar laser ranging, Astronomy & Astrophysics, 659, A148, http://doi.org/10.1051/0004-6361/202142841 As the simulated data is still under scientific investigation, the data sets are of a preliminary nature and show work in progress at the Institute of Geodesy at Leibniz University Hannover. ----- Hofmann, F. (2017), _Lunar Laser Ranging – verbesserte Modellierung der Monddynamik und Schätzung relativistischer Parameter_, PhD thesis, Leibniz University Hannover.

Changed value of field source_metadata_modified to 2023-09-26T14:04:37.033640 in Simulated DLLR data for timespan 1970 - 2021

              
    
          
          
        
        
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            n 2   "author": "Mingyue Zhang", n 2   "author": "Zhang, Mingyue",
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            15   "license_title": "CC-BY-NC-3.0", 18   "license_title": "CC-BY-NC-3.0",
            16   "maintainer": "Liliane Biskupek", 19   "maintainer": "Liliane Biskupek",
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            20   "name": "luh-simulated-dllr-data-for-timespan-1970-2021", 23   "name": "luh-simulated-dllr-data-for-timespan-1970-2021",
            21   "notes": "Differential Lunar Laser Ranging (DLLR) is a new concept  24   "notes": "Differential Lunar Laser Ranging (DLLR) is a new concept 
            22 which will be implemented at the Table Mountain Observatory of JPL. A  25 which will be implemented at the Table Mountain Observatory of JPL. A 
            23 DLLR station will measure a lunar reflector at time t1 to get a range  26 DLLR station will measure a lunar reflector at time t1 to get a range 
            24 measurement. After a short switching interval (e.g., 1.5 min), the  27 measurement. After a short switching interval (e.g., 1.5 min), the 
            25 same station at time t2 will measure another reflector to get another  28 same station at time t2 will measure another reflector to get another 
            26 range. The DLLR observation will be obtained by the difference of the  29 range. The DLLR observation will be obtained by the difference of the 
            27 two consecutive range measurements, called lunar range difference. As  30 two consecutive range measurements, called lunar range difference. As 
            28 no actual DLLR data is available now, we did the DLLR simulation based  31 no actual DLLR data is available now, we did the DLLR simulation based 
            29 on modifying the LLR simulation software of Hofmann (2017).\r\n\r\nThe  32 on modifying the LLR simulation software of Hofmann (2017).\r\n\r\nThe 
            30 simulated DLLR data is simulated according to the real Lunar Laser  33 simulated DLLR data is simulated according to the real Lunar Laser 
            31 Ranging (LLR) 28093 normal points from 1970 to 2021 provided by the  34 Ranging (LLR) 28093 normal points from 1970 to 2021 provided by the 
            32 stations McDonald, MLRS1, MLRS2, OCA, WLRS, MLRO, APOLLO and LURE for  35 stations McDonald, MLRS1, MLRS2, OCA, WLRS, MLRO, APOLLO and LURE for 
            33 the reflectors Apollo 11, Apollo 14, Apollo 15, Lunokhod 1 and 2. The  36 the reflectors Apollo 11, Apollo 14, Apollo 15, Lunokhod 1 and 2. The 
            34 data distribution, the assumed stations and reflectors used for DLLR  37 data distribution, the assumed stations and reflectors used for DLLR 
            35 simulation are the same as those of the real LLR data group. We  38 simulation are the same as those of the real LLR data group. We 
            36 simulated four DLLR data groups, two with 1.5-minute switching  39 simulated four DLLR data groups, two with 1.5-minute switching 
            37 interval, two with 15-minute switching interval. Each switching  40 interval, two with 15-minute switching interval. Each switching 
            38 interval group includes two subgroups with different observation  41 interval group includes two subgroups with different observation 
            39 accuracies. One is the same as the LLR range accuracy and another one  42 accuracies. One is the same as the LLR range accuracy and another one 
            40 is 200 times improved based on LLR range accuracy. For this DLLR  43 is 200 times improved based on LLR range accuracy. For this DLLR 
            41 simulation, the used temperature, pressure, wavelength and humidity of  44 simulation, the used temperature, pressure, wavelength and humidity of 
            42 the station are the same for the two measurement time points t1 and  45 the station are the same for the two measurement time points t1 and 
            43 t2.\r\n\r\nThe respective columns of the data contain the following  46 t2.\r\n\r\nThe respective columns of the data contain the following 
            44 information: \r\n\r\n1. station CODE\r\n2. measuring time t1  47 information: \r\n\r\n1. station CODE\r\n2. measuring time t1 
            45 [JD]\r\n3. reflector 1\r\n4. reflector 2\r\n5. range difference  48 [JD]\r\n3. reflector 1\r\n4. reflector 2\r\n5. range difference 
            46 [km]\r\n6. accuracy [um]\r\n7. temperature[ Celsius degree]\r\n8.  49 [km]\r\n6. accuracy [um]\r\n7. temperature[ Celsius degree]\r\n8. 
            47 pressure [hPa]\r\n9. wavelength [um]\r\n10. humidity [%]\r\n\r\nA  50 pressure [hPa]\r\n9. wavelength [um]\r\n10. humidity [%]\r\n\r\nA 
            48 detailed description of the simulation process and the analysis of the  51 detailed description of the simulation process and the analysis of the 
            n 49 data sets is published as \"_Characteristics of differential lunar  n 52 data sets is published as: Zhang, M.; M\u00fcller, J.; Biskupek, L. & 
            50 laser ranging_, Astronomy & Astrophysics, in review, 2022\".\r\n\r\nAs  53 Singh, V. V. (2022): Characteristics of differential lunar laser 
            54 ranging, Astronomy & Astrophysics, 659, A148, 
            55 http://doi.org/10.1051/0004-6361/202142841\r\n\r\nAs the simulated 
            51 the simulated data is still under scientific investigation, the data  56 data is still under scientific investigation, the data sets are of a 
            52 sets are of a preliminary nature and show work in progress at the  57 preliminary nature and show work in progress at the Institute of 
            53 Institute of Geodesy at Leibniz University  58 Geodesy at Leibniz University Hannover.\r\n\r\n-----\r\nHofmann, F. 
            54 Hannover.\r\n\r\n-----\r\nHofmann, F. (2017), _Lunar Laser Ranging  59 (2017), _Lunar Laser Ranging \u2013 verbesserte Modellierung der 
            55 \u2013 verbesserte Modellierung der Monddynamik und Sch\u00e4tzung  60 Monddynamik und Sch\u00e4tzung relativistischer Parameter_, PhD 
            56 relativistischer Parameter_, PhD thesis, Leibniz University  61 thesis, Leibniz University Hannover.\r\n",
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            154       "description": "Simulated DLLR data with a switching interval of  158       "description": "Simulated DLLR data with a switching interval of 
            155 15 min. The DLLR accuracy is 200 times improved based on LLR range  159 15 min. The DLLR accuracy is 200 times improved based on LLR range 
            156 accuracy.", 160 accuracy.",
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            160       "last_modified": "2022-01-30T06:13:50.678336", 164       "last_modified": "2022-01-30T06:13:50.678336",
            n 161       "metadata_modified": "2023-08-04T08:46:47.289990", n 165       "metadata_modified": "2024-11-28T13:02:02.152030",
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            164       "name": "simDLLR_15_0.005LLRacc.txt", 168       "name": "simDLLR_15_0.005LLRacc.txt",
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            169       "state": "active", 173       "state": "active",
            170       "url":  174       "url": 
            171 d6cc-8098-40b7-bfc0-296b0a8c2e79/download/simdllr_15_0.005llracc.txt", 175 d6cc-8098-40b7-bfc0-296b0a8c2e79/download/simdllr_15_0.005llracc.txt",
            172       "url_type": "" 176       "url_type": ""
            173     } 177     }
            174   ], 178   ],
            175   "services_used_list": "", 179   "services_used_list": "",
            176   "source_metadata_created": "2022-01-28T21:33:12.479794", 180   "source_metadata_created": "2022-01-28T21:33:12.479794",
            t 177   "source_metadata_modified": "2022-01-30T06:13:50.692772", t 181   "source_metadata_modified": "2023-09-26T14:04:37.033640",
            178   "state": "active", 182   "state": "active",
            179   "tags": [ 183   "tags": [
            180     { 184     {
            181       "display_name": "DLLR", 185       "display_name": "DLLR",
            182       "id": "e68ecacf-37b5-44eb-8565-bb3767be2eb5", 186       "id": "e68ecacf-37b5-44eb-8565-bb3767be2eb5",
            183       "name": "DLLR", 187       "name": "DLLR",
            184       "state": "active", 188       "state": "active",
            185       "vocabulary_id": null 189       "vocabulary_id": null
            186     }, 190     },
            187     { 191     {
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            189       "id": "8240e7b8-a384-40b0-8863-e6576f1ca179", 193       "id": "8240e7b8-a384-40b0-8863-e6576f1ca179",
            190       "name": "LLR", 194       "name": "LLR",
            191       "state": "active", 195       "state": "active",
            192       "vocabulary_id": null 196       "vocabulary_id": null
            193     } 197     }
            194   ], 198   ],
            195   "terms_of_usage": "Yes", 199   "terms_of_usage": "Yes",
            196   "title": "Simulated DLLR data for timespan 1970 - 2021", 200   "title": "Simulated DLLR data for timespan 1970 - 2021",
            197   "type": "vdataset", 201   "type": "vdataset",
            198   "url":  202   "url": 
            199 a.uni-hannover.de/dataset/simulated-dllr-data-for-timespan-1970-2021", 203 a.uni-hannover.de/dataset/simulated-dllr-data-for-timespan-1970-2021",
            200   "version": "" 204   "version": ""
            201 } 205 }