Skip to main content

Advertisement

Table 1 EISCAT_3D resolution and range extent requirements for the different science topics. A phased array system with fast pointing, multiple beams and calibrated signal is assumed

From: The science case for the EISCAT_3D radar

Science topic Parameter for which resolution is given Temporal resolution (s) Horizontal resolution (km) Vertical resolution (km) Height range (km)
Mesoscale electrodynamics and flows (including BBFs) N e, T e, T i, V i 10 20 in the F region 2 85–400
Small-scale (auroral) dynamics N e 1 1 0.5 70–500
T e, T i, V i – “– – “– – “– 85–400
Fine-scale auroral structures N e, T e, T i 0.1 0.1 0.2 70–200
V i 0.1 0.1 5 120–400
Ion outflow (natural and heater-induced) N e, T e, T i, V i, ion comp. 10 10 20 200–1500
NEIALs (aperture synthesis imaging) Raw data 0.03 0.05 at 300 km 1 100–1500
Ionospheric irregularities N e, T e, T i, V i 1 1 1 90–800
Topside composition (O+, He+, H+) mi (and N e, T e, T i, V i) 10 N/A N/A 300–1500
Transition region composition (NO+/O2 + vs. O+) mi (and N e, T e, T i, V i) 10 N/A 10 km 100–300
High-energy particle events (SEPs, etc.) N e 1 10 1 50–400
T e, T i, V i – “– – “– – “– 100–400
Atmosphere-ionosphere coupling (AGW, winds) N e, T e, T i, V i, V n <1 min 1 0.1 or better As low as possible—120 km
Mesosphere-stratosphere-troposphere (MST) small-scale dynamics Vector neutral wind, N e <1 min 1 0.1 or better As low as possible—110 km
D region phenomena N e, T e (=T i) V i (=V n) 1 1 0.3 70–90
PMSE, PMWE Raw data, Doppler velocity, spectral width <1 min 1 0.1 or better 55–95
Meteoroids and their effects on the background (Es, PMSE etc.), high-power mode Raw data, polarisation matrix, and N e, T e, T i, V i 1 ms 0.01 0.01 (30) 70–200 (1000)
Planets and asteroids Raw data, power, polarisation matrix 10-MHz sampling   15 m  
Interplanetary scintillation Raw data 0.01 N/A N/A N/A
Heating experiments N e, T e, T i, V i 1 1 1 100–2000
Heating experiments, aperture synthesis imaging Spectra (raw data) IPP (~2 ms) 0.01–0.05 0.1 100–300
Space debris monitoring and satellite tracking Raw data, power, Doppler velocity 10-MHz sampling   15 m  
Meteoroid monitoring (piggyback and low-power mode) Raw data, polarisation matrix, and N e, T e, T i, V i IPP ~100 ms for low-power mode 0.01 Down to 10 m (30) 70–200 (1000)