Satellite instrument package

Cosmos -1809 satellite was equipped with the following scientific
instruments:

   1. IS-338 satellite ionospheric station   -   radiosounding  of  
ionosphere  at 338 fixed frequencies in the range of 0.3-15.95 MHz
Ionosonde measures plasma density profiles above HmF2 height and
integral plasma density along beam trajectory. Accuracy of Hm
measurements is ~ 10-20 km and Fm ~ 1 %.

   Investigator  -  Yu.V.Kushnerevsky, IZMIRAN (deceased)
   Contact person - S.A. Pulinets

   2. IZ-2 impedance zond  - for measurements of local electron
concentration and its inhomogeneities. Accuracy of Ne measurements
is ~ 0.1 %.

   Investigator and contact person - G.M.Komrakov, NIRFI

   3. KM-9 high-frequency probe - measurement of electron temperature 
in the range 600 K -5000 K. Accuracy of Te measurements is ñ 200 K.
   
   Investigator and contact person- V.V.Afonin, IKI

   4. NAM-4  mass-spectrometer - measurements of ion and neutral
composition of upper atmosphere in the range 1-60 a.e.m.. Accuracy of
Ni concentration measurements is ~ 10 %.

   Investigator and contact person -  V.G.Istomin, IKI

   5. CF-3M  photoelectron spectrometer - measurements of angular 
and energetic distribution of photoelectrons and ions in the range 
10 eV -15 keV. Accuracy of Fe measurements is ~ 10 %.

   Investigator and contact person -  Yu.I.Galperin, IKI

   6. DEP  detector of electric field   -  measurements of two 
components of DC electric field. Accuracy of E measurements is
~ 0.5 mV/m.

   Investigator and contact person- V.M.Chmirev, IZMIRAN

   7. ANCH-2ME analyser of low frequency waves -recording of electric 
and magnetic components of electromagnetic field in the range of 
70 Hz-20 kHz. Accuracy of E- and H-components measurements is ~ 0.1 %.

   Investigator and contact person  - Ya.P.Sobolev, IZMIRAN


   8. AVCH-2K  analyser of high-frequency waves - recording of  
electric component of electromagnetic field in the range of 
frequencies 0.1 MHz -30 MHz and measurements of impedance of dipole
antenna in the range of frequencies 0.1 MHz -9.05 MHz.

   Investigator and contact person -  C.A.Pulinetz, IZMIRAN