Scott Polar Research InstituteSPRI library catalogue
Search the catalogue
Browse recordsView a record
Please note: You are viewing the legacy database of the Scott Polar Research Institute Library catalogue. It is no longer being updated, so does not reliably reflect our current library holdings.
Please search for material in iDiscover for up-to-date information about the library collection.
Record #150892:
- #150892
Main publication details
MARC recordSmall-scale structure of ionospheric absorption of cosmic noise during pre-onset and sharp onset phases of an auroral absorption substorm / Hilkka Ranta, Aarne Ranta, J.K. Hargreaves.
| Title: | Small-scale structure of ionospheric absorption of cosmic noise during pre-onset and sharp onset phases of an auroral absorption substorm / Hilkka Ranta, Aarne Ranta, J.K. Hargreaves. |
| Author(s): | Ranta, Hilkka. Ranta, Aarne. Hargreaves, J. K. |
| Date: | 1999. |
| In: | Geophysica. (1999.), Vol. 35(1-2) (1999) |
| Abstract: | Impulsive pulsations of ionospheric absorption were found in imaging riometer measurements at Kilpisjärvi during pre-onset and onset phases of auroral absorption substorms. Periods of pulsations varied between 2 and 18 minutes during pre-onset phase and from 2 to 90 seconds during onset, which was characterised by fast northward or southward propagation. Absorption and magnetic field spectra show almost same features. Results suggest that substorm processes can be found on closed field lines. |
| Notes: | Geophysica. Vol. 35(1-2) :45-57 (1999). |
| Keywords: | 550.385 -- Magnetic disturbances and variations. 551.510.535 -- Ionosphere. A -- Geophysical sciences (general). (*3) -- Arctic regions. (*56) -- Finland. |
| SPRI record no.: | 150892 |
LDR 01432naa#a2200000#a#4500 001 SPRI-150892 005 20240418171452.0 007 ta 008 240418s1999####xx#ab#|##|###|0||#0|eng#d 035 ## ‡aSPRI-150892 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aRanta, Hilkka. 245 10 ‡aSmall-scale structure of ionospheric absorption of cosmic noise during pre-onset and sharp onset phases of an auroral absorption substorm /‡cHilkka Ranta, Aarne Ranta, J.K. Hargreaves. 260 ## ‡a[S.l.] :‡b[s.n.],‡c1999. 300 ## ‡ap. 45-57 :‡bill., diags., table, map. 500 ## ‡aGeophysica. Vol. 35(1-2) :45-57 (1999). 520 3# ‡aImpulsive pulsations of ionospheric absorption were found in imaging riometer measurements at Kilpisjärvi during pre-onset and onset phases of auroral absorption substorms. Periods of pulsations varied between 2 and 18 minutes during pre-onset phase and from 2 to 90 seconds during onset, which was characterised by fast northward or southward propagation. Absorption and magnetic field spectra show almost same features. Results suggest that substorm processes can be found on closed field lines. 650 07 ‡a550.385 -- Magnetic disturbances and variations.‡2udc 650 07 ‡a551.510.535 -- Ionosphere.‡2udc 650 07 ‡aA -- Geophysical sciences (general).‡2local 651 #7 ‡a(*3) -- Arctic regions.‡2udc 651 #7 ‡a(*56) -- Finland.‡2udc 700 1# ‡aRanta, Aarne. 700 1# ‡aHargreaves, J. K. 773 0# ‡7nnas ‡tGeophysica. ‡gVol. 35(1-2) (1999) ‡wSPRI-90230 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240418