Loading observations…
Echoes through the day
Five beams · 50–120 kmPeak excess signal/noise (dB). Click a colorbar to adjust its limits.
No delivered record Below detection threshold
Radar image
All five beamsClick a time and altitude in the plot above to explore an echo.
Positive source power with 2-D Haar-wavelet sparsity. Uncheck for the legacy TSVD comparison.
Select a range and time to begin.
Imaging methods & references
Experimental methods fit calibrated complex covariances directly, with nonnegative source power. Compact echoes use pixel ℓ₁ and optional reweighting; PMSE uses analysis ℓ₁ on a 2-D Haar pyramid, not TV or point-source sparsity. The image is relative reconstructed power, not calibrated SNR. Sparse censoring, approximate noise weights and historical phase calibration limit interpretation; inspect the residual and convergence warning.
- Beck & Teboulle (2009): FISTA — accelerated proximal solver for compact-source ℓ₁.
- Candès, Wakin & Boyd (2008): reweighted ℓ₁ — optional compact-source sparsity refinement.
- Girard et al. (2015): sparse representations in interferometric imaging — background on multiscale sparse imaging; not a claim of the same implementation.
Range–Doppler spectrum
Velocity through the day
Peak SNR across 50–120 km · five beamsSky noise & receiver temperature
Loading numeric sky-noise data…
Archive & transfer
Waiting for archive inventory…
Retained percentage per UTC hour = retained complex samples / full dense spectral samples × 100. Missing retention is unknown, not zero.
Preparing numeric inventory…
About the observations & downloads
The download button exports the selected UTC day's available native HDF5 files in a TAR archive, including sparse complex spectra for all seven receiver channels and all retained coherent looks, plus the Digital Metadata properties file. Today's archive grows as observations arrive.
Only cells passing the 3 dB excess-signal SNR and statistical gates are retained. Missing cells are censored, not measured zero power. Grey indicates no delivered record, which may still be processing or transferring. A high radial velocity alone does not establish a vertical draft.
Hide single-mode echoes is an optional display-only meteor-trail suppression heuristic, applied to the RTIs, both Doppler plots and radar image. A detection needs another detection at the same range gate in the same beam in the previous or next delivered mode, with a gap no greater than ten minutes; Doppler may change. Newest echoes without prior support remain hidden until confirmed. Short real PMSE/PMWE echoes can also be hidden, and multi-mode meteor trails can remain. No archive data or downloads are changed.
Altitude is the nominal beam-center height. HSV encodes Doppler centroid, spectral width, and peak SNR. Radar images use a selected slant-range shell and at most 120 seconds of looks; their intensity is relative reconstructed power, not calibrated SNR. Historical phase calibration has not been independently validated for these observations.
Download derived plot data · HDF5 · Processing & data format