Subject: [IGSMAIL-3093]: [IGSMAIL-3091]: Geodesy and Meteorology session in EGS
From: [email-masked]
To: [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked], [email-masked],
Cc: [email-masked]
Date: Wed, 8 Nov 2000 13:45:39 +0100

******************************************************************************
IGS Electronic Mail      08 Nov 05:00:52 PST 2000      Message Number 3093
******************************************************************************

Author: Joachim Feltens
subject: High-rate GPS-campaign.

Dr. Joachim Feltens                               Darmstadt, 8 November 2000
IGS Ionosphere Working Group Chairman
EDS at ESOC-FDD
Robert-Bosch-Strasse 5
D-64293 Darmstadt
GERMANY
e-mail: [email-masked]

Subject: High-rate GPS-campaign.

Dear IGS colleagues, dear colleagues from the ground stations,

As you all know, have now reached the solar maximum, and a lot of inte-
resting ionospheric phenomena at the polar caps and in the equatorial
region can be observed.

It is the first time that during a solar maximum ionospheric behavior can
be observed with the dense IGS/GPS ground station net. The ionosphere
scientists are thus very interested in the dual-frequency GPS tracking data
collected from the IGS sites. Since a lot of phenomena in the ionosphere
are short-lived (like travelling wave structures) and cannot be extracted
with the standard 30 sec sampling rate of IGS RINEX files, there is much
interest to collect during a dedicated IGS campaign high-rate GPS tracking
data, e.g. with 1 or 3 sec sampling rate. The current solar maximum is a
unique chance to establish such a high-rate tracking database which could
be subject for ionospheric analyses over years. High-rate GLONASS tracking
would also be welcome. - The IGS did run a similar campaign during the
solar eclipse on 11 August 1999.

I am, as chairman of the IGS Ionosphere Working Group, would thus like
to propose, together with Dr. Norbert Jakowski from DLR Neustrelitz, to
organize a dedicated IGS campaign. The duration of such a campaign
should be in the order of 3-5 days, e.g. in April/May 2001 and also
non-IGS stations, e.g. ionosondes, EISCAT, should participate. Concerning
the date when to run such a campaign, there are two possibilities:
1) A concrete date will be fixed quite early for which the ground stations
can then prepare, or
2) a date will be fixed short-termed after a large solar event (normally
the solar plasma needs then about 2 days to reach the Earth), i.e. the
ground stations will have a pre-warning time of some days only.

Since a fixed measuring campaign is much more easier to organize, we favor
item 1) at present for collecting further experience. Furthermore, this
enables us to co-ordinate this IGS-activity with other ionospheric obser-
vation programs or measuring campaigns. If the IGS community is interested
to carry out the proposed high-rate GPS measuring campaign, we will contact
the ionosphere community for defining a concrete campaign over 3-5 days.

There are three regions of interest which are in sequence of importance:
1) Northern Polar Cap, 2) Southern Polar Cap, 3) Equator. For your con-
venience I have put together a list of relevant stations I identfied:

Northern Polar Cap:    latitude > +50 deg.

01) artu   Arti/Russian Federation            lat =  56.4
02) bili   Bilibino/Russian Federation        lat =  68.1
03) bor1   Borowiec/Poland                    lat =  52.1
04) chur   Churchill/Canada                   lat =  58.8
05) fair   Fairbanks/Alaska/U.S.A             lat =  65.0
06) flin   CFS Flin Flon/Canada               lat =  54.7
07) hofn   Hoefn/Iceland                      lat =  64.3
08) irkt   Irkutsk/Russia                     lat =  52.2
09) joze   Jozefoslaw/Poland                  lat =  52.1
10) kely   Kangerlussuaq/Greenldand/Denmark   lat =  67.0
11) kiru   Kiruna/Sweden                      lat =  67.9
12) kodk   Kodiak/Alaska/U.S.A.               lat =  57.7
13) kosg   Kootwijk/The Netherlands           lat =  52.2
14) kstu   Krasnoyrsk/Russia                  lat =  56.0
15) lama   Olsztyn/Poland                     lat =  53.9
16) mag0   Magadan/Russian Federation         lat =  59.6
17) mdvo   Mendeleevo/Russia                  lat =  56.0
18) mets   Kirkkonummi/Finland                lat =  60.2
19) nril   Norilsk/Russian Federation         lat =  69.4
20) nvsk   Novosibirsk/Russia                 lat =  54.8
21) nyal   Ny-Alesund/Spitzbergen/Norway      lat =  78.9
22) onsa   Onsala/Sweden                      lat =  57.4
23) petp   Petropavlovsk/Russian Federation   lat =  53.1
24) pots   Potsdam/Germany                    lat =  52.4
25) reyk   Reykjavik/Iceland                  lat =  64.1
26) sch2   Schefferville/Canada               lat =  54.8
27) spt0   Boras/Sweden                       lat =  57.7
28) thu1   Thule/Greenland/Denmark            lat =  76.5
29) tixi   Tixi/Russian Federation            lat =  71.6
30) trom   Tromsoe/Norway                     lat =  69.7
31) whit   Whitehorse/Canada                  lat =  60.8
32) will   Williams Lake/Canada               lat =  52.2
33) wsrt   Westerbork/The Netherlands         lat =  52.9
34) wuhn   Wuhan City/P.R. China              lat =  30.5
35) yakz   Yakutsk/Russian Federation         lat =  62.0
36) yell   Yellowknife/Canada                 lat =  62.5
37) zwen   Zwenigorod/Russia                  lat =  55.7

Southern Polar Cap:    latitude < -50 deg.

38) amun   South Pole/Antarctica              lat = -90.0
39) cas1   Casey/Antarctica                   lat = -66.3
40) dav1   Davis/Antarctica                   lat = -68.6
41) goug   Gough Is./Tristan da Cunha/U.K.    lat = -40.3
42) hob2   Hobart/Tasmania/Australia          lat = -42.8
43) kerg   Kerguelen Islands/France           lat = -49.4
44) mac1   MacQuarie Island/New Zealand       lat = -54.5
45) maw1   Mawson/Antarctica                  lat = -67.6
46) mcm4   McMurdo/Antarctica                 lat = -77.8
47) ohig   O'higgins/Antarctica               lat = -63.3
48) palm   Palmer Station/Antarctica          lat = -64.8
49) riog   Rio Grande/Argentina               lat = -53.8
50) syog   East Ongle Island/Antarctica       lat = -69.0
51) vesl   Sanae IV/Antarctica                lat = -71.7

Equator:  -20 deg < latitude < +20 deg. , to account for the
          geomagnetic equator, in South America stations were
          taken down to lat = -30 deg and in East Asia sta-
          tions were taken up to lat = + 30 deg.

52) areq   Arequipa/Peru                      lat = -16.5
53) asc1   Ascension Island/U.K.              lat =  -8.0
54) bako   Cibinong/Indonesia                 lat =  -6.5
55) barb   Bridgetown/Barbados                lat =  13.1
56) bogt   Bogota/Colombia                    lat =   4.6
57) braz   Brasilia/Brazil                    lat = -15.9
58) coco   Cocos Island/Australia             lat = -12.2
59) cord   Cordoba/Argentina                  lat = -31.7
60) cro1   Virgin Islands/U.S.                lat =  17.8
61) darw   Darwin/Australia                   lat = -12.8
62) dgar   Diego Garcia Island/U.K.           lat =  -7.3
63) eisl   Easter Island/Chile                lat = -27.1
64) esti   Esteli/Nicaragua                   lat =  13.1
65) fort   Fortaleza/Brazil                   lat =  -3.9
66) gala   Galapagos Is./Ecuador              lat =  -0.7
67) guam   Debedo/Guam                        lat =  13.6
68) guat   Guatemala City/Guatemala           lat =  14.6
69) igm0   Buenos Aires/Argentina             lat = -34.6
70) iisc   Bangalore/India                    lat =  13.0
71) jab1   Jabiru/Australia                   lat = -12.7
72) jama   Kingston/Jamaica                   lat =  17.9
73) kayt   Philippes                          lat =  14.0
74) kour   Kourou/French Guyana               lat =   5.3
75) kunm   Kunming/P.R. China                 lat =  25.1
76) kwj1   Kwajalein Atoll/Marshall Is.       lat =   8.7
77) lhas   Lhasa/Tibet/P.R. China             lat =  29.7
78) lpgs   La Plata/Argentina                 lat = -34.9
79) mali   Malindi/Kenya                      lat =  -3.0
80) mana   Managua/Nicaragua                  lat =  12.1
81) mkea   Mauna Kea/Hawaii/U.S.A.            lat =  19.8
82) moin   Moin/Costa Rica                    lat =   9.9
83) nklg   Libreville/Gabon                   lat =   0.4
84) ntus   Singapore/Republic of Singapore    lat =   1.3
85) pimo   Quezon City/Phillipines            lat =  14.6
86) riop   Riobamba/Ecuador                   lat =  -1.7
87) sant   Santiago/Chile                     lat = -33.2
88) sey1   La Misere/Seychelles               lat =  -4.7
89) slor   San Lorenzo/Honduras               lat =  13.4
90) ssia   San Salvador/El Salvador           lat =  13.7
91) taiw   Taipei/Taiwan                      lat =  25.0
92) tegu   Tegucigalpa/Honduras               lat =  14.1
93) thti   Papeete/Tahiti                     lat = -17.6
94) tow2   Cape Ferguson/Australia            lat = -19.3
95) tvst   Philippines                        lat =  14.0
96) unsa   Salta/Argentina                    lat = -24.7
97) ykro   Yamoussoukro/Cote D'ivorie         lat =   6.9

I suppose that the major limitation of the number of stations will be
the space needed at CDDIS to archive the data. During the last year's
solar eclipse campaign about 60 stations provided high-rate data over
one day and some also on the day before and after. So I am looking for
your answers and comments in order to get an impression whether such a
campaign should be restricted to region 1 only, or could be extended
for region 2 and eventually for region 3.

If you are responding me by e-mail, please send also a copy to
                                               [email-masked]

Best regards           Joachim Feltens