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Location: UFOUpDatesList.Com > 2007 > May > May 19

Re: UK F-15 UFO Incident - Shough

From: Martin Shough <parcellular.nul>
Date: Fri, 18 May 2007 17:30:19 +0100
Fwd Date: Sat, 19 May 2007 07:58:47 -0400
Subject: Re: UK F-15 UFO Incident - Shough

Dear List

There has been speculation that the radar-visual object
investigated by the two Lakenheath F-15s over the UK on Jan 12
could have been wind-blown. The pilots referred at the time to
radar-measured true speeds between 30 and 80 knots, and one
later interviewed by DFCIT, RAF, reportedly stated that it
seemed to move "with the wind", although it isn't clear that
this refers to direction as well as speed. There is no
information either in the audio file or in the RAF report as to
the direction of movement of the object or the location of the ~
4.5 min incident, save that it was between 17,000 and 18,000 ft
over the UK, neither is there any winds-aloft information or any
indication as to whether this was actually checked by the USAF
pilot(s) or the DFCIT interviewer.

So, relevant radiosonde observations made at six UK balloon
release sites on Jan 12, 2007 were located and are tabulated
below. Wind speeds and directions are given in each case for the
altitude level closest to 17,500 ft.

                    12:0000hr   12:1200hr   13:0000hr

               kts  degs     kts  degs     kts  degs

Camborne       54   280       55   285      53   246
Albemarle      103  315       77   285      89   270
Castor Bay      90  280       99   270      85   260
Herstm'x        96  310       63   305      52   260
Larkhill         3* 307*      62   294       -     -
Lerwick         76  290        -     -      74   272

To summarise, winds at the flight level were on average from the
west over the UK (mean 283 deg, varying between 246-315 deg)
with an average speed of 75 knots (varying between 52-103 kts).

Conclusion: Both the mean and maximum reported UFO speeds (55
kts & 80 kts) are within the range of variation of wind speeds
and so are not inconsistent with the hypothesis of a windborne
object, but without knowing the direction of motion this can't
be tested further.

Martin Shough

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