FDD
Frequency Domain Decomposition — singular-value decomposition of the cross-spectral matrix.
Brincker · Zhang · Andersen
Modal Master for Windows
Operational modal analysis
for structural engineers.
Identify frequencies, damping ratios, and mode shapes from measured vibration data. Prepare signals, compare FDD and SSI results, review diagnostics, and produce engineering reports in one desktop application.
0ENGINES
FDD and SSI methods; availability varies by edition.
0ESTIMATORS
Half-power and CFDD damping cross-checks.
σANALYTIC
SSI uncertainty in Pro and Ultimate.
f₀SESAME
HVSR / SESAME in all three editions.
Engine Library
Frequency- and time-domain
Frequency- and time-domain
identification methods.
Use frequency-domain decomposition (FDD) and stochastic subspace identification (SSI) to estimate modal parameters. Review candidates before adding them to the identified mode set used by visualization and reporting.
EFDD
Enhanced FDD — spectral-bell isolation and correlation decay for frequency and damping estimates.
Brincker · VenturaFSDD
Frequency-Spatial Domain Decomposition — spatial filtering for modal identification.
Zhang et al.CFDD
Curve-fit FDD — single-degree-of-freedom fitting for damping estimation.
Jacobsen · AndersenAFDD Peak Wizard
Guided peak selection using modal coherence scores.
Modal-coherence criterionSSI-COV
Covariance-driven SSI with stabilization diagrams.
Van Overschee · De MoorSSI-DATA
Data-driven SSI using orthogonal projection.
Peeters · De RoeckSSI-UPCX
SSI with conditional frequency and damping uncertainty estimates.
Method family — Döhler · Mevel
The analysis bench
Signal preparation
Signal preparation
and spectral analysis.
Inspect signal quality, apply conditioning, and review spectra before identification.
Welch PSD · CSDAveraged auto- and cross-spectra with windowing, leakage, and power correction handled explicitly.
STFT spectrogramInspect how spectral content changes over the record.
CoherenceMagnitude-squared coherence between a selected pair of channels.
CZT zoom · GoertzelChirp-Z band zoom and single-bin Goertzel probes for high-resolution inspection of narrow bands.
Burg AR spectrumParametric maximum-entropy spectrum with AIC order selection.
Spectral statisticsDominant-frequency, energy, and dynamic-range descriptors for any selected channel.
Conditioning pipelinePolynomial detrending, zero-phase IIR filtering, and anti-aliased decimation.
Harmonic line suppressionDetect, review, and suppress periodic spectral lines.
Channel health screeningInspect clipping, drift, spikes, dropouts, spectral contrast, and spectral kurtosis. SNR requires a supported noise model.
ODSOperating deflection shapes on your geometry, with ODS spectrum and waterfall views.
“What is this?”
Contextual engineering help includes equations, figures, and references in English and Turkish.
Selected capabilities
Automation, uncertainty,
Automation, uncertainty,
and site characterization.
I / AUTOMATED IDENTIFICATION
Deep Estimate
Deep Estimate runs an iterative identification workflow, adjusts eligible methods and settings, and records the resulting decisions. It is a paid Pro add-on and is included in Ultimate.
Review the diagnostics, acceptance checks, and retained or reverted actions in the decision log. How Deep Estimate works →
II / ANALYTIC UNCERTAINTY
SSI uncertainty estimates
SSI-UPCX reports conditional frequency and damping uncertainty from sensitivity propagation under a fixed-observability residual model. Full SSI sampling coverage is not established, and these estimates do not establish that a mode is physical.
- σ (f)Conditional frequency standard uncertainty.
- σ (ζ)Conditional damping-ratio standard uncertainty.
- Family scatterDescriptive spread across fitted models, reported separately.
III / SEISMIC SITE CHARACTERIZATION
HVSR site characterization
Included in Core, Pro, and Ultimate. Review horizontal-to-vertical spectral ratios (HVSR), SESAME curve and peak criteria, directional H/V, and peak-frequency stability. SAF and strong-motion file support are also available.
- SESAMEIndividual curve-reliability and peak-clarity checks.
- f₀Fundamental-frequency stability across time windows and azimuths.
- .V2 / .SMCStrong-motion formats ingested natively, next to your ambient data.
Validation battery
Review modal
Review modal
quality and agreement.
Compare mode shapes, inspect stabilization and complexity, and review damping disagreement. Available diagnostics depend on the selected method and edition.
MACModal Assurance Criterion matrices across the full identified set.
CrossMACCross-method shape correlation across the current FDD and SSI families.
MPC · MPDModal phase collinearity and mean phase deviation for complexity screening.
StabilizationMulti-order stabilization diagrams with stability and heuristic quality screens.
Damping cross-checkHalf-power bandwidth and CFDD fit are the two current estimators; the source estimator is excluded from its own cross-check.
Harmonic screeningInspect periodic-line contamination before interpreting damping.
Aliasing riskPer-mode aliasing exposure assessed against the acquisition chain.
Mode qualityQuality indicators help prioritize candidate review.
The workflow
From measurements
From measurements
to engineering reports.
01
Import
Import measurement files and review channels, units, and sampling information.
02
Condition
Detrend, filter, decimate, and inspect the prepared signals.
03
Identify
Run the methods in your edition, or use Deep Estimate with the appropriate entitlement.
04
Validate
Review correlation, complexity, damping checks, and available uncertainty estimates.
05
Accept modes
Add reviewed candidates to the identified mode set used by downstream tools.
06
Report & visualize
Use the full-screen 3D Geometry Editor and animate mode shapes on measurement or parametric geometry, then prepare structured reports. Available in all three editions.
In the field
Structural applications.
Desktop workflow
Desktop tools for
Desktop tools for
engineering work.
Local analysis
Measurement analysis runs on your Windows computer. Connect to the internet for activation and whenever you start the app. Your existing device credential authorizes subsequent starts automatically; you do not need a new activation code.
Results for technical review
Inspect modal diagnostics and retain the analysis settings and available evidence with your project.
Engineering reports
Generate structured reports from your analysis results, with project branding.
Annual licensing
One active device per licence. After online authorization, a running session can continue through a temporary connection loss within its signed lease, for up to seven days and no later than your licence term ends. Restarting the app requires an internet connection.
English and Turkish
Interface and contextual help in English and Turkish. PDF reporting is available in English.
Product support
Contact us about technical evaluation, training, and support options.
Editions & add-ons
Compare editions.
One-year, one-seat licences for Core, Pro, and Ultimate. Choose manual or automatic annual renewal when you buy. Discount codes are available with either option.
Compare edition featuresModal Master Core
€2,900 / year
The complete essential OMA workflow, from signal preparation to validation and reporting.
- FDD and EFDD
- SSI-COV with stabilization diagrams
- MAC and AutoMAC validation
- Peak quality and harmonic checks
- 3D mode visualization and full-screen Geometry Editor
- HVSR / SESAME site characterization
- Engineering reports and data workflows
Modal Master Pro
€5,900 / year
Additional FDD and SSI methods, uncertainty estimates, and multi-setup workflows.
- All Core features
- FSDD and CFDD
- SSI-DATA, UPC/PC/CVA, and SSI-UPCX
- PoSER multi-setup workflows
- Jacobian uncertainty and advanced validation
- Deep Estimate available separately
Modal Master Ultimate
€11,900 / year
All Pro features, with Deep Estimate included.
- All Pro features
- Deep Estimate included
Feature by feature
What’s included.
Core provides the complete essential OMA workflow. Pro adds advanced methods and validation. Ultimate includes Deep Estimate. HVSR / SESAME and the full-screen 3D Geometry Editor are shared by all three.
Included Not includedPaid add-on sold separately
| Features | Core | Pro | Ultimate |
|---|---|---|---|
| Modal identification | |||
| FDD & EFDD | Included | Included | Included |
| SSI-COV & stabilization diagrams | Included | Included | Included |
| FSDD & CFDD | Not included | Included | Included |
| SSI-DATA, UPC/PC/CVA & SSI-UPCX | Not included | Included | Included |
| Validation & uncertainty | |||
| MAC & AutoMAC | Included | Included | Included |
| Peak quality & harmonic checks | Included | Included | Included |
| Advanced validation: COMAC, CrossMAC & mode quality | Not included | Included | Included |
| Jacobian uncertainty estimates | Not included | Included | Included |
| Engineering workflow | |||
| Measurement import & signal preparation | Included | Included | Included |
| 3D mode visualization & engineering reports | Included | Included | Included |
| Full-screen 3D Geometry Editor | Included | Included | Included |
| PoSER multi-setup workflows | Not included | Included | Included |
| Deep Estimate | Not included | Paid add-on | Included |
| Site characterization | |||
| HVSR analysis | Included | Included | Included |
| SESAME checks & directional analysis | Included | Included | Included |
Launch add-on
Add Deep Estimate to Pro
Core customers cannot purchase add-ons. Deep Estimate is included in Ultimate and is the only add-on available in the launch wave.
Deep Estimate cannot be selected until checkout availability is confirmed. It is included in Ultimate.
Deep Estimate follows Pro’s one-year term and your selected renewal method. A discount code must cover every item in your selection, including the add-on; eligibility is checked before checkout.
Choose manual renewal for one year with no automatic charge, or automatic annual renewal. Paddle confirms the amount, tax, and renewal terms before payment.
Verified academic pricing is 40% below commercial pricing and cannot be combined with another offer.
MEASUREMENT & STRUCTURAL ASSESSMENT
Yapı Deprem Checkup
Bring building vibration measurements and structural models into the same engineering review. Explore the Checkup workflow, OMA and SAP2000 model comparison, and guidance for building owners and engineering teams.
Explore Yapı Deprem CheckupWebsite available in Turkish and English.
Get started
Ready for your next analysis?
Choose the edition that fits your work. Explore the demo first, or contact us for edition guidance and technical support.
Technical evaluations · Edition guidance · Licensing enquiries