The first notam is for the drill rig. Location is
N37 11 51 w116 29 45
(Paste into Google Earth or other mapping program)

L0022/09 - "EC-ER-11 DRILL PAD 37,11'51"N/116,29'45"W BTY 013/27 NOTE: DRILL
RIG CONSTRUCTION OPERATIONS WILL BE CONDUCTED AT EC-ER-11 DRILL PAD
FOR A 120FT TALL DRILL RIG. ACTIVITY WILL REMAIN WITHIN A 1 NM RADIUS
OF ECR-ER-11 (37,11'51"N/116,29'45"W, BTY 013/27) SFC TO 500 AGL. 04 MAR 21:40
2009 UNTIL 01 JUN 23:59 2009. CREATED: 04 MAR 21:42 2009
----------------------------------------------------------------------------------

These are the GPS jamming notams. If you look at the location, it is in the Groom Lake valley, a bit to the north east of the main operation area.

Paste N37 19 00 W115 42 49 into Google Earth or whatever mapping program you use.


L0017/09 - 02/072 (A0083/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE

WITHIN A 390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC
/BTY/ 057 DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH
DECREASE IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000
FT MSL, AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO
EXTENDS INTO THE MEXICAN FIR. 02 MAR 20:00 2009 UNTIL 02 MAR 21:45
2009. CREATED:
27 FEB 19:01 2009. 27 FEB 23:25 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB
23:26 2009

L0016/09 - 02/084 (A0085/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 03 MAR 20
02/078 (A0084/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 03 MAR 02:45 2009 UNTIL 03 MAR 04:30 2009. CREATED:
27 FEB
19:09 2009. 27 FEB 23:24 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:25
2009

L0015/09 - 02/090 (A0086/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 04 MAR 02:45 2009 UNTIL 04 MAR 05:30 2009. CREATED:
27 FEB
19:22 2009. 27 FEB 23:23 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:24
2009

L0014/09 - 02/090 (A0086/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 04 MAR 02:45 2009 UNTIL 04 MAR 05:30 2009. CREATED:
27 FEB
19:22 2009. 27 FEB 23:15 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:15
2009

L0013/09 - 02/096 (A0087/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 05 MAR 02:45 2009 UNTIL 05 MAR 05:30 2009. CREATED:
27 FEB
19:28 2009. 27 FEB 23:14 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:15
2009

L0012/09 - 02/102 (A0088/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 06 MAR 02:45 2009 UNTIL 06 MAR 05:30 2009. CREATED:
27 FEB
19:55 2009. 27 FEB 23:13 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:14
2009

L0011/09 - 02/108 (A0089/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 06 MAR 19:30 2009 UNTIL 06 MAR 22:00 2009. CREATED:
27 FEB
20:04 2009. 27 FEB 23:10 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:10
2009

L0010/09 - 02/114 (A0090/09) - NAV GPS IS UNRELIABLE AND MAY BE UNAVAILABLE
WITHIN A
390NM RADIUS OF N37 19 00 W115 42 49 OR THE BEATTY VORTAC /BTY/ 057
DEGREE RADIAL AT 58.6NM, AT FL400, DECREASING IN AREA WITH DECREASE
IN ALTITUDE TO 325NM RADIUS AT FL250, 317NM RADIUS AT 10000 FT MSL,
AND 239NM RADIUS AT 4000 FT AGL. THIS IMPACT AREA ALSO EXTENDS INTO
THE MEXICAN FIR. 07 MAR 02:45 2009 UNTIL 07 MAR 05:30 2009. CREATED:
27 FEB
20:09 2009. 27 FEB 23:08 2009 UNTIL 21 MAR 23:59 2009. CREATED: 27 FEB 23:08
2009

Many UAVs and weapons are GPS-guided. Consequently, adversaries are likely to attempt to jam GPS signals to prevent such vehicles and weapons from being effectively used. GPS jamming exercises are routinely carried out at the Nevada Test and Training Range, China Lake, and other military complexes to determine how jamming will affect U.S. military capabilities.

For a while after 911 when up in the chopter we would experience GPS drop outs in and around Nuclear Power plants and the like. From my understanding they can selectivly turn off or degrade GPS anytime anywhere they wish. It stands to reason that they would effect those usch areas as a security measure.

If you attend the Nellis air show, then GPS jammer team is there. They have the jamming equipment there as well. It is substantailly less sophisticated than you think. Basically, they have a dual source RF generator that they modulated with broadband noise. Dual band so they can jam US civilian and military gps frequencies. They also have some ols Soviet era jammer gear to show.

Technically, Groom Lake is a neutral country during Red Flag, so they shouldn't be jamming from there. I am assuming this jamming is related to the current Red Flag, which runs to the end of the week.