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. Author manuscript; available in PMC: 2017 Jan 6.
Published in final edited form as: Metrologia. 2016;53(Technical Suppl):03005. doi: 10.1088/0026-1394/53/1A/03005

NIST Christopher Meyer
National Institute of Standards and Technology
100 Bureau Drive
Gaithersburg, MD 20899
USA

Tel.: 301-975-4825
Fax: 301-548-0206
e-mail : cmeyer@nist.gov

LACOMET Adrián Solano
Luis Chávez Santacruz
Ciudad de la Investigación,
University of Costa Rica,
San Pedro, San José, Costa Rica

Tel.: 506-2283-6580
Fax: 506-2283-6580
e-mail: asolano@lacomet.go.cr
lchavez@lacomet.go.cr