-------- 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