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## Reference Measuring Complex of Length within the Range up to 60 m from the State Primary Special Standard of a Unit of Length

Transactions of IAA RAS, issue 52, 63–67 (2020)

Keywords: length measurement, single unit reproduction, meter definition, femtosecond laser

### Abstract

The reference measuring complex of length (RMC), which is a part of the GET 199–2018, in the range up to 60 m is the initial means of measuring technology in the structure of the standard and is intended for reproducing, storing and transmitting the size of a unit of length to high-precision means of measuring equipment, and also provides traceability to the standard of time and frequency. In order to confirm the high accuracy characteristics of the complex under consideration, the state of such foreign complexes and measuring instruments was analyzed based on the website of the International Bureau of Weights and Measures (BIPM), joint studies of the metrological characteristics of GET 199–2018 and GET 192–2017. The results of the tests of absolute rangefinders (electronic total stations) are presented, demonstrating a wide range of RMC applications. In accordance with the requirements for standards, the RMC must reproduce, store and transmit a unit of length. To achieve the set goals, one of the BIPM’s possible recommendations for reproducing a unit length of a meter in accordance with the new definition of a meter was used, namely, an indirect method for measuring the time of flight of a light pulse to a target (reflector) and vice versa. To achieve high accuracy in measuring lengths, a femtosecond laser with a short pulse duration was used. The scale factor in this method of reproducing a unit of length is the repetition frequency of femtosecond pulses. The storage function is realized due to the phase stabilization system based on the GET-1 laser pulse repetition frequency and its constant control during the length measurement. The transfer of a unit of length was carried out using a 64 meter comparator, placed in a special isolated room. RMC has high accuracy characteristics that correspond to the world level, which is confirmed by the data of similar foreign systems presented on the BIPM website, as well as a joint research with the standard GET 192. It has the ability to transfer the size of a unit of length to both high-precision measuring instruments and electronic total stations.

### Citation

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D. A. Sokolov, O. M. Oleinik-Dzyadik, I. S. Silvestrov. Reference Measuring Complex of Length within the Range up to 60 m from the State Primary Special Standard of a Unit of Length // Transactions of IAA RAS. — 2020. — Issue 52. — P. 63–67. @article{sokolov2020, abstract = {The reference measuring complex of length (RMC), which is a part of the GET 199–2018, in the range up to 60 m is the initial means of measuring technology in the structure of the standard and is intended for reproducing, storing and transmitting the size of a unit of length to high-precision means of measuring equipment, and also provides traceability to the standard of time and frequency. In order to confirm the high accuracy characteristics of the complex under consideration, the state of such foreign complexes and measuring instruments was analyzed based on the website of the International Bureau of Weights and Measures (BIPM), joint studies of the metrological characteristics of GET 199–2018 and GET 192–2017. The results of the tests of absolute rangefinders (electronic total stations) are presented, demonstrating a wide range of RMC applications. In accordance with the requirements for standards, the RMC must reproduce, store and transmit a unit of length. To achieve the set goals, one of the BIPM’s possible recommendations for reproducing a unit length of a meter in accordance with the new definition of a meter was used, namely, an indirect method for measuring the time of flight of a light pulse to a target (reflector) and vice versa. To achieve high accuracy in measuring lengths, a femtosecond laser with a short pulse duration was used. The scale factor in this method of reproducing a unit of length is the repetition frequency of femtosecond pulses. The storage function is realized due to the phase stabilization system based on the GET-1 laser pulse repetition frequency and its constant control during the length measurement. The transfer of a unit of length was carried out using a 64 meter comparator, placed in a special isolated room. RMC has high accuracy characteristics that correspond to the world level, which is confirmed by the data of similar foreign systems presented on the BIPM website, as well as a joint research with the standard GET 192. It has the ability to transfer the size of a unit of length to both high-precision measuring instruments and electronic total stations.}, author = {D.~A. Sokolov and O.~M. Oleinik-Dzyadik and I.~S. Silvestrov}, doi = {10.32876/ApplAstron.52.63-67}, issue = {52}, journal = {Transactions of IAA RAS}, keyword = {length measurement, single unit reproduction, meter definition, femtosecond laser}, pages = {63--67}, title = {Reference Measuring Complex of Length within the Range up to 60 m from the State Primary Special Standard of a Unit of Length}, url = {http://iaaras.ru/en/library/paper/2038/}, year = {2020} } TY - JOUR TI - Reference Measuring Complex of Length within the Range up to 60 m from the State Primary Special Standard of a Unit of Length AU - Sokolov, D. A. AU - Oleinik-Dzyadik, O. M. AU - Silvestrov, I. S. PY - 2020 T2 - Transactions of IAA RAS IS - 52 SP - 63 AB - The reference measuring complex of length (RMC), which is a part of the GET 199–2018, in the range up to 60 m is the initial means of measuring technology in the structure of the standard and is intended for reproducing, storing and transmitting the size of a unit of length to high-precision means of measuring equipment, and also provides traceability to the standard of time and frequency. In order to confirm the high accuracy characteristics of the complex under consideration, the state of such foreign complexes and measuring instruments was analyzed based on the website of the International Bureau of Weights and Measures (BIPM), joint studies of the metrological characteristics of GET 199–2018 and GET 192–2017. The results of the tests of absolute rangefinders (electronic total stations) are presented, demonstrating a wide range of RMC applications. In accordance with the requirements for standards, the RMC must reproduce, store and transmit a unit of length. To achieve the set goals, one of the BIPM’s possible recommendations for reproducing a unit length of a meter in accordance with the new definition of a meter was used, namely, an indirect method for measuring the time of flight of a light pulse to a target (reflector) and vice versa. To achieve high accuracy in measuring lengths, a femtosecond laser with a short pulse duration was used. The scale factor in this method of reproducing a unit of length is the repetition frequency of femtosecond pulses. The storage function is realized due to the phase stabilization system based on the GET-1 laser pulse repetition frequency and its constant control during the length measurement. The transfer of a unit of length was carried out using a 64 meter comparator, placed in a special isolated room. RMC has high accuracy characteristics that correspond to the world level, which is confirmed by the data of similar foreign systems presented on the BIPM website, as well as a joint research with the standard GET 192. It has the ability to transfer the size of a unit of length to both high-precision measuring instruments and electronic total stations. DO - 10.32876/ApplAstron.52.63-67 UR - http://iaaras.ru/en/library/paper/2038/ ER -