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-------- Original Message --------The NWS upper air office at Yap, in the Pacific (WMO# 91413), transitioned from the Vaisala RS80-57H radiosonde to the Lockheed Martin Sippican B2 radiosonde on October 8, 2010. No observations were missed as the site switched to the B2 radiosonde.
The B2 radiosonde has been used in the NWS Upper air network since June, 1997. Unlike the Vaisala RS80-57H, a solar/IR radiation temperature correction is not applied to the B2 data at the station prior to dissemination.
_/*NOTE:*/_ Yap is the last station in the network to use the Vaisala RS80-57Hradiosonde. The last 70 Vaisala radiosondes were shipped to the site on August 30, but have not arrived yet. They may have been lost in transit. If the radiosondes do arrive, Yap will temporally switch back to the Vaisala radiosonde, use up the supplies, and then go back to the B2 radiosonde until further notice. I will send you updates as they come in.
Please update your databases.Questions on the radiosonde transition should be directed to Joseph Facundo, Observing Systems Branch Chief, at Joseph.Facundo@xxxxxxxx
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