/// <summary>
/// Recursively calculates the nearest sound speed profiles along a given radial using a binary search-like algorithm
/// 1. If start and end points are provided, use them, otherwise find the nearest SSP to each of those points
/// 2. If the start point was calculated, add the SSP closest to the calculated start point to the enumerable
/// 2. If the SSPs closest to the start and end points are within 10m of each other they are considered identical and there are
/// assumed to be no more intervening points
/// 3. If the SSPs closest to the start and end points are NOT within 10m of each other, calculate the midpoint of the segment
/// and find the nearest SSP to that point.
/// 4. If the SSP nearest the midpoint is not within 10m of the SSP nearest to the start point, recursively call this function to
/// find the new midpoint between the start point and the current midpoint
/// 5. Return the
/// </summary>
/// <param name="segment"></param>
/// <param name="startDistance"></param>
/// <param name="startProfile"></param>
/// <param name="endProfile"></param>
/// <param name="bottomProfile"></param>
/// <param name="soundSpeedData"></param>
/// <param name="deepestProfile"></param>
/// <returns></returns>
static IEnumerable<Tuple<double, SoundSpeedProfile>> ProfilesAlongRadial(GeoSegment segment, double startDistance, SoundSpeedProfile startProfile, SoundSpeedProfile endProfile, BottomProfile bottomProfile, EnvironmentData<SoundSpeedProfile> soundSpeedData, SoundSpeedProfile deepestProfile)
{
var returnStartProfile = false;
var returnEndProfile = false;
if (startProfile == null)
{
returnStartProfile = true;
startProfile = soundSpeedData.IsFast2DLookupAvailable
? soundSpeedData.GetNearestPointAsync(segment[0]).Result.Extend(deepestProfile)
: soundSpeedData.GetNearestPoint(segment[0]).Extend(deepestProfile);
}
if (endProfile == null)
{
returnEndProfile = true;
endProfile = soundSpeedData.IsFast2DLookupAvailable
? soundSpeedData.GetNearestPointAsync(segment[1]).Result.Extend(deepestProfile)
: soundSpeedData.GetNearestPoint(segment[1]).Extend(deepestProfile);
}
if (returnStartProfile) yield return Tuple.Create(NearestBottomProfileDistanceTo(bottomProfile, startDistance), startProfile);
// If the start and end profiles are the same, we're done
if (startProfile.DistanceKilometers(endProfile) <= 0.01) yield break;
// If not, create a middle profile
var middleProfile = soundSpeedData.IsFast2DLookupAvailable
? soundSpeedData.GetNearestPointAsync(segment.Center).Result.Extend(deepestProfile)
: soundSpeedData.GetNearestPoint(segment.Center).Extend(deepestProfile);
// If the center profile is different from BOTH endpoints
if (startProfile.DistanceKilometers(middleProfile) > 0.01 && middleProfile.DistanceKilometers(endProfile) > 0.01)
{
// Recursively create and return any new sound speed profiles between the start and the center
var firstHalfSegment = new GeoSegment(segment[0], segment.Center);
foreach (var tuple in ProfilesAlongRadial(firstHalfSegment, startDistance, startProfile, middleProfile, bottomProfile, soundSpeedData, deepestProfile)) yield return tuple;
var centerDistance = startDistance + Geo.RadiansToKilometers(segment[0].DistanceRadians(segment.Center));
// return the center profile
yield return Tuple.Create(NearestBottomProfileDistanceTo(bottomProfile, centerDistance), middleProfile);
// Recursively create and return any new sound speed profiles between the center and the end
var secondHalfSegment = new GeoSegment(segment.Center, segment[1]);
foreach (var tuple in ProfilesAlongRadial(secondHalfSegment, centerDistance, middleProfile, endProfile, bottomProfile, soundSpeedData, deepestProfile)) yield return tuple;
}
var endDistance = startDistance + Geo.RadiansToKilometers(segment.LengthRadians);
// return the end profile
if (returnEndProfile) yield return Tuple.Create(NearestBottomProfileDistanceTo(bottomProfile, endDistance), endProfile);
}
static double NearestBottomProfileDistanceTo(BottomProfile bottomProfile, double desiredDistance)
{
var profilePoints = bottomProfile.Profile;
for (var i = 0; i < profilePoints.Count - 1; i++)
{
if (desiredDistance > profilePoints[i + 1].Range) continue;
var distanceToNearerPoint = desiredDistance - profilePoints[i].Range;
var distanceToFartherPoint = profilePoints[i + 1].Range - desiredDistance;
return distanceToNearerPoint <= distanceToFartherPoint ? profilePoints[i].Range : profilePoints[i + 1].Range;
}
return profilePoints.Last().Range;
}
void Calculate(Radial radial)
{
try
{
var scenario = radial.TransmissionLoss.AnalysisPoint.Scenario;
var mode = (from m in radial.TransmissionLoss.Modes
orderby m.MaxPropagationRadius
select m).Last();
var platform = mode.Source.Platform;
var timePeriod = platform.Scenario.TimePeriod;
if (radial.IsDeleted) return;
var wind = (Wind)_cacheService[scenario.Wind].Result;
if (radial.IsDeleted) return;
var soundSpeed = (SoundSpeed)_cacheService[scenario.SoundSpeed].Result;
if (radial.IsDeleted) return;
var bathymetry = (Bathymetry)_cacheService[scenario.Bathymetry].Result;
if (radial.IsDeleted) return;
var sediment = (Sediment)_cacheService[scenario.Sediment].Result;
if (radial.IsDeleted) return;
var deepestPoint = bathymetry.DeepestPoint;
var deepestProfile = soundSpeed[timePeriod].GetDeepestSSP(deepestPoint).Extend(deepestPoint.Data);
var depthAtAnalysisPoint = bathymetry.Samples.IsFast2DLookupAvailable
? bathymetry.Samples.GetNearestPointAsync(radial.TransmissionLoss.AnalysisPoint.Geo).Result
: bathymetry.Samples.GetNearestPoint(radial.TransmissionLoss.AnalysisPoint.Geo);
// If there is less than one meter of water at the analysis point, discard this radial
if (depthAtAnalysisPoint.Data > -1)
{
radial.Delete();
return;
}
var windData = wind[timePeriod].EnvironmentData;
var windSample = windData.IsFast2DLookupAvailable
? windData.GetNearestPointAsync(radial.Segment.Center).Result
: windData.GetNearestPoint(radial.Segment.Center);
var sedimentSample = sediment.Samples.IsFast2DLookupAvailable
? sediment.Samples.GetNearestPointAsync(radial.Segment.Center).Result
: sediment.Samples.GetNearestPoint(radial.Segment.Center);
var bottomProfile = new BottomProfile(99, radial.Segment, bathymetry);
var directoryPath = Path.GetDirectoryName(radial.BasePath);
if (directoryPath == null) return;
if (!Directory.Exists(directoryPath)) Directory.CreateDirectory(directoryPath);
if (Globals.PluginManagerService != null && Globals.PluginManagerService[PluginType.TransmissionLossCalculator] != null)
{
var profilesAlongRadial = ProfilesAlongRadial(radial.Segment, 0.0, null, null, bottomProfile, soundSpeed[timePeriod].EnvironmentData, deepestProfile).ToList();
if (radial.IsDeleted) return;
radial.CalculationStarted = DateTime.Now;
try
{
mode.GetTransmissionLossPlugin(Globals.PluginManagerService).CalculateTransmissionLoss(platform, mode, radial, bottomProfile, sedimentSample, windSample.Data, profilesAlongRadial);
}
catch (RadialDeletedByUserException)
{
radial.CleanupFiles();
}
radial.CalculationCompleted = DateTime.Now;
radial.Length = mode.MaxPropagationRadius;
radial.IsCalculated = true;
LocationContext.Modify(c =>
{
var transmissionLoss = (from tl in c.TransmissionLosses
where tl.Guid == radial.TransmissionLoss.Guid
select tl).Single();
transmissionLoss.Radials.Add(radial);
radial.TransmissionLoss = transmissionLoss;
});
}
else Debug.WriteLine("TransmissionLossCalculatorService: PluginManagerService is not initialized, or there are no transmission loss calculator plugins defined");
}
catch (Exception e)
{
Debug.WriteLine("{0}: FAIL: Calculation of transmission loss for radial bearing {1} degrees, of mode {2} in analysis point {3}. Exception: {4}",
DateTime.Now,
radial == null ? "(null)" : radial.Bearing.ToString(CultureInfo.InvariantCulture),
radial == null || radial.TransmissionLoss == null || radial.TransmissionLoss.Modes == null || radial.TransmissionLoss.Modes.Count == 0 ? "(null)" : radial.TransmissionLoss.Modes[0].ToString(),
radial == null || radial.TransmissionLoss == null || radial.TransmissionLoss.AnalysisPoint == null || radial.TransmissionLoss.AnalysisPoint.Geo == null ? "(null)" : ((Geo)radial.TransmissionLoss.AnalysisPoint.Geo).ToString(), e.Message);
}
}
public abstract void CalculateTransmissionLoss(Platform platform,
Mode mode,
Radial radial,
BottomProfile bottomProfile,
SedimentType sedimentType,
double windSpeed,
IList<Tuple<double, SoundSpeedProfile>> soundSpeedProfilesAlongRadial);
public override void CalculateTransmissionLoss(Platform platform, Mode mode, Radial radial, BottomProfile bottomProfile, SedimentType sedimentType, double windSpeed, IList<Tuple<double, SoundSpeedProfile>> soundSpeedProfilesAlongRadial)
{
var sourceDepth = platform.Depth;
var frequency = (float)Math.Sqrt(mode.HighFrequency * mode.LowFrequency);
if (mode.Depth.HasValue) sourceDepth += mode.Depth.Value;
var directoryPath = Path.GetDirectoryName(radial.BasePath);
if (directoryPath == null) throw new NullReferenceException("radial.BasePath does not point to a valid directory");
if (!Directory.Exists(directoryPath)) Directory.CreateDirectory(directoryPath);
// Derived Parameters
// ==================
// Note: All the specific calculations given in the comments below assume a frequency of 1kHz
// lambda is wavelength, in meters
var lambda = ReferenceSoundSpeed / frequency;
// if dz < 1m round dz down to either [1/10, 1/5, 1/4 or 1/2] m ... or multiples of 10^-n of these numbers
// = [1 2 2.5 or 5 ] x 0.1m " " ...
// if dz > 1m round dz down to either [1 2 2.5 5 ] m ... or multiples of 10^+n of these numbers
// var fixpoints = new List<double> { 1, 2, 2.5, 5 };
// dz = 0.1 * lambda
var dz = RelativeDepthResolution * lambda;
// make dz a 'pretty' number
//dz = Fix2X10pN(dz, fixpoints);
// ndz is the depth decimation factor
// MinimumOutputDepthResolution is 10m
// dz is 0.1 * lambda (dz = 0.15 for a 1 kHz signal, 'pretty' dz = 0.2 @ 1kHz)
// so ndz = (10 / 0.2) = 50 @ 1kHz
// this means that we will only output every 50 computational depth cells, giving us a depth
// resolution of 50 * 0.2m = 10m @ 1kHz which is what we want it to be. Outstanding.
var ndz = (int)Math.Max(1.0, Math.Floor(MinimumOutputDepthResolution / dz));
// similar for dr and assoc. grid decimation
// RelativeRangeResolution is 2, so with our 'pretty' dz = 0.2, dr = 0.4
var dr = RelativeRangeResolution * dz;
// make dr a 'pretty' number, in this case 0.25
//dr = Fix2X10pN(dr, fixpoints);
// ndr is the range decimation factor
// MinimumOutputRangeResolution is 10m
// dr is 0.25 * lambda, so (10 / 0.25) gives us an ndr of 40
// this means that we will only output every 40 computational range cells, giving us a range
// resolution of 40 * 0.25m = 10m @ 1kHz which is what we want it to be. Outstanding.
var ndr = (int)Math.Max(1, Math.Floor(MinimumOutputRangeResolution / dr));
// attenuation layer (round up to nearest dz)
var sedimentLambda = sedimentType.CompressionWaveSpeed / frequency;
var sedimentLayerDz = Math.Ceiling(LastLayerThickness * sedimentLambda / dz) * dz;
var attenuationLayerDz = Math.Ceiling(AttenuationLayerThickness * sedimentLambda / dz) * dz;
var maxSubstrateDepth = bottomProfile.MaxDepth + sedimentLayerDz;
var zstep = dz * ndz;
var zmplt = Math.Ceiling((bottomProfile.MaxDepth + 2 * zstep) / zstep) * zstep;
// Maximum Depth for PE calc -> zmax
// zmax is the z-limit for the PE calc from top of the water column to the bottom of the last substrate layer
// (including the attentuation layer if, as recommended, this is included)
var zmax = maxSubstrateDepth + attenuationLayerDz;
var envFileName = radial.BasePath + ".env";
//Debug.WriteLine("Scenario: '{0}' Mode: '{2}' Analysis point: {1} Bearing: {3}, zmplt: {4}",
// radial.TransmissionLoss.AnalysisPoint.Scenario.Name,
// radial.TransmissionLoss.AnalysisPoint.Geo,
// radial.TransmissionLoss.Modes[0].ModeName,
// radial.Bearing, zmplt);
using (var envFile = new StreamWriter(envFileName, false))
{
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "Scenario: '{0}' Mode: '{2}' Analysis point: {1} Bearing: {3}",
radial.TransmissionLoss.AnalysisPoint.Scenario.Name,
radial.TransmissionLoss.AnalysisPoint.Geo,
radial.TransmissionLoss.Modes[0].ModeName,
radial.Bearing));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.000000}\t{1:0.000000}\t{2:0.000000}\t\tf [Frequency (Hz)], zs [Source Depth (m)], zrec0 [First receiever depth (m)]",
frequency,
sourceDepth,
0.1));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.000000}\t{1:0.000000}\t{2}\t\t\trmax[Max range (m)], dr [Range resolution (m)], ndr [Range grid decimation factor]",
mode.MaxPropagationRadius + (dr * ndr),
dr,
ndr));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.000000}\t{1:0.000000}\t{2}\t{3:0.000000}\tzmax [Max computational depth (m)], dz [Depth resolution (m)], ndz [Depth grid decimation factor], zmplot [Maximum depth to plot (m)]",
zmax,
dz,
ndz,
zmplt));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.000000}\t{1}\t{2}\t{3:0.000000}\t\tc0 [Reference sound speed (m/s)], np [Number of terms in Padé expansion], ns [Number of stability constraints], rs [Maximum range of stability constraints (m)]",
ReferenceSoundSpeed,
PadeExpansionTerms,
StabilityConstraints,
StabilityConstraintMaxRange));
// todo: different stuff goes here for RAMSGeo
// bathymetry data
var first = true;
foreach (var profilePoint in bottomProfile.Profile)
{
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture,
"{0:0.000000}\t{1:0.000000}{2}",
profilePoint.Range * 1000,
profilePoint.Depth,
first ? "\t\t\t\t\tbathymetry data [range (m), depth (m)]" : ""));
first = false;
}
envFile.WriteLine("-1\t-1");
// range-dependent environment profiles
var firstRangeProfile = true;
foreach (var rangeProfileTuple in soundSpeedProfilesAlongRadial)
{
// Range of profile only written for second and subsequent profiles
if (!firstRangeProfile) envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.#}\t\t\t\t\t\t\tProfile range (m)", rangeProfileTuple.Item1 * 1000));
var firstSoundSpeedProfile = true;
foreach (var profilePoint in rangeProfileTuple.Item2.Data)
{
if (double.IsNaN(profilePoint.SoundSpeed)) break;
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.######}\t{1:0.######}{2}",
profilePoint.Depth,
profilePoint.SoundSpeed,
firstSoundSpeedProfile ? "\t\t\t\t\tsound speed profile in water [depth (m), sound speed (m/s)]" : ""));
firstSoundSpeedProfile = false;
}
envFile.WriteLine("-1\t-1");
// todo: RAMGeo and RAMSGeo also support sediment layers, as well as range-dependent sediment, neither of which is not yet supported by ESME
// If sediment layers are ever supported, put a loop like for the sound speed profile above
// A sediment layer is analogous to a sound speed profile point
// For range-dependent sediment, the sediment samples have to be at the same ranges as the sound speed profiles
// so we might want to change the API to include sediment properties in what is the current range and sound speed profile tuple
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.######}\t{1:0.######}\t\t\t\t\t\tcompressive sound speed profile in substrate [depth (m), sound speed (m/s)]", 0.0, sedimentType.CompressionWaveSpeed));
envFile.WriteLine("-1\t-1");
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.######}\t{1:0.######}\t\t\t\t\t\tdensity profile in substrate [depth (m), rhob (g/cm³)]", 0.0, sedimentType.Density));
envFile.WriteLine("-1\t-1");
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.######}\t{1:0.######}\t\t\t\t\t\tcompressive attenuation profile in substrate [depth (m), attnp (db/lambda)]", 0.0, 0.0));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0:0.######}\t{1:0.######}", attenuationLayerDz, 40));
envFile.WriteLine("-1\t-1");
firstRangeProfile = false;
}
}
var tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetFileNameWithoutExtension(envFileName));
//Debug.WriteLine(string.Format("Env File: {0} temp path: {1}", envFileName, tempDirectory));
if (Directory.Exists(tempDirectory))
{
var files = Directory.GetFiles(tempDirectory, "*.*");
foreach (var file in files) File.Delete(file);
Directory.Delete(tempDirectory, true);
} else if (File.Exists(tempDirectory)) File.Delete(tempDirectory);
Directory.CreateDirectory(tempDirectory);
File.Copy(envFileName, Path.Combine(tempDirectory, "ramgeo.in"));
using (var steerableArrayFile = new StreamWriter(Path.Combine(tempDirectory, "sra.in"), false))
{
// From http://www.activefrance.com/Antennas/Introduction%20to%20Phased%20Array%20Design.pdf
// theta3 = 3dB beam width, in degrees
// emitterSize = size of emitter array, in meters
// theta3 = (0.886 * lambda / arrayLength) * 180 / pi
// so, doing the algebra and solving for arrayLength, you get:
// emitterSize = (0.886 * lambda) / (theta3 * (pi / 180))
var emitterSize = (0.886 * lambda) / (mode.VerticalBeamWidth * (Math.PI / 180.0));
var emitterCount = (int)(emitterSize / (dz * 2));
var emitterSpacing = 1.0;
var weights = new List<double> { 1 };
if (emitterCount > 1)
{
emitterSpacing = emitterSize / (emitterCount - 1);
// chebyshev window calculations for relative emitter strength across the array
var discreteFourierTransform = new MathNet.Numerics.IntegralTransforms.Algorithms.DiscreteFourierTransform();
var r0 = Math.Pow(10, mode.SideLobeAttenuation / 20.0);
var n = emitterCount - 1;
var a = Complex.Cosh((1.0 / n) * Acosh(r0));
var am = new Complex[n];
for (var m = 0; m < n; m++) am[m] = a * Complex.Cos(Math.PI * m / n);
var wm = new Complex[n];
var sign = 1;
for (var i = 0; i < n; i++)
{
if (am[i].Magnitude > 1) wm[i] = sign * Complex.Cosh(n * Acosh(am[i]));
else wm[i] = sign * Complex.Cos(n * Complex.Acos(am[i]));
sign *= -1;
}
discreteFourierTransform.BluesteinInverse(wm, FourierOptions.Default);
weights = wm.Select(e => e.Real).ToList();
weights[0] /= 2;
weights.Add(weights[0]);
var maxWeight = weights.Max();
for (var i = 0; i < weights.Count; i++) weights[i] /= maxWeight;
}
steerableArrayFile.WriteLine("{0}\t{1}\t{2}", emitterCount, emitterSpacing, mode.DepressionElevationAngle);
for (var i = 0; i < emitterCount; i++) steerableArrayFile.WriteLine("{0}", weights[i]);
}
//File.Copy(Path.Combine(AssemblyLocation, "sra.in"), Path.Combine(tempDirectory, "sra.in"));
//Debug.WriteLine(string.Format("Env File: {0} copied to: {1}", envFileName, tempDirectory));
// Now that we've got the files ready to go, we can launch bellhop to do the actual calculations
var ramProcess = new Process
{
StartInfo = new ProcessStartInfo(Path.Combine(AssemblyLocation, "RAMGeo.exe"))
{
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardInput = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
WorkingDirectory = tempDirectory
}
};
if (radial.IsDeleted) throw new RadialDeletedByUserException();
ramProcess.Start();
try
{
ramProcess.PriorityClass = ProcessPriorityClass.Idle;
}
catch (InvalidOperationException) { }
//ramProcess.BeginOutputReadLine();
while (!ramProcess.HasExited)
{
if (radial.IsDeleted)
{
ramProcess.Kill();
throw new RadialDeletedByUserException();
}
Thread.Sleep(20);
}
var ramOutput = ramProcess.StandardOutput.ReadToEnd();
var ramError = ramProcess.StandardError.ReadToEnd();
if (ramProcess.ExitCode != 0)
{
Debug.WriteLine("RAMGeo process for radial {0} exited with error code {1:X}", radial.BasePath, ramProcess.ExitCode);
Debug.WriteLine(ramError);
Directory.Delete(tempDirectory, true);
return;
}
//File.Delete(Path.Combine(tempDirectory, "ramgeo.in"));
//File.Delete(radial.BasePath + ".grid");
//File.Move(Path.Combine(tempDirectory, "tl.grid"), radial.BasePath + ".grid");
//File.Delete(radial.BasePath + ".line");
//File.Move(Path.Combine(tempDirectory, "tl.line"), radial.BasePath + ".line");
//File.Delete(radial.BasePath + ".pgrid");
//File.Move(Path.Combine(tempDirectory, "p.grid"), radial.BasePath + ".pgrid");
//File.Delete(radial.BasePath + ".sra");
//File.Move(Path.Combine(tempDirectory, "sra.in"), radial.BasePath + ".sra");
using (var writer = new StreamWriter(radial.BasePath + ".bty")) writer.Write(bottomProfile.ToBellhopString());
if (File.Exists(Path.Combine(tempDirectory, "p.grid")))
{
var pressures = ReadPGrid(Path.Combine(tempDirectory, "p.grid"));
File.Copy(Path.Combine(tempDirectory, "p.grid"), radial.BasePath + ".pgrid", true);
//File.Delete(radial.BasePath + ".pgrid");
if (pressures.Count == 0)
{
Debug.WriteLine("Temp directory: " + tempDirectory);
Debug.WriteLine("RAMGeo stdout: " + ramOutput);
Debug.WriteLine("RAMGeo stderr: " + ramError);
Directory.Delete(tempDirectory, true);
return;
}
var rangeCount = pressures.Count;
var depthCount = pressures[0].Length;
var rr = new double[rangeCount];
var rd = new double[depthCount];
for (var rangeIndex = 0; rangeIndex < rr.Length; rangeIndex++) rr[rangeIndex] = (rangeIndex + 1) * dr * ndr;
for (var depthIndex = 0; depthIndex < rd.Length; depthIndex++) rd[depthIndex] = depthIndex * zstep;
//Debug.WriteLine("Scenario: '{0}' Mode: '{2}' Analysis point: {1} Bearing: {3}, zmplt: {4}, zstep: {5}, maxDepth: {6}, fileName: {7}, reqDepthCells: {8}, actualDepthCells: {9}",
// radial.TransmissionLoss.AnalysisPoint.Scenario.Name,
// radial.TransmissionLoss.AnalysisPoint.Geo,
// radial.TransmissionLoss.Modes[0].ModeName,
// radial.Bearing,
// zmplt,
// zstep,
// rd.Last(),
// Path.GetFileNameWithoutExtension(radial.BasePath),
// zmplt / zstep,
// depthCount);
var shadeFile = new ShadeFile(sourceDepth, frequency, rd, rr, pressures);
shadeFile.Write(radial.BasePath + ".shd");
//BellhopOutput.WriteShadeFile(radial.BasePath + ".shd", sourceDepth, frequency, rd, rr, pressures);
}
else
{
//Debug.WriteLine("Scenario: {0} Analysis point: {1} Mode {2} Bearing {3}",
// radial.TransmissionLoss.AnalysisPoint.Scenario.Name,
// radial.TransmissionLoss.AnalysisPoint.Geo,
// radial.TransmissionLoss.Modes[0].ModeName,
// radial.Bearing);
//Debug.WriteLine("p.grid file not found in RAMGeo output directory");
}
Directory.Delete(tempDirectory, true);
//Debug.WriteLine(string.Format("Env File: {0} temp directory deleted: {1}", envFileName, tempDirectory));
}
protected void CalculateTransmissionLossInternal(Platform platform, Mode mode, Radial radial, BottomProfile bottomProfile, SedimentType sedimentType, double windSpeed, IList<Tuple<double, SoundSpeedProfile>> soundSpeedProfilesAlongRadial, bool createArrivalsFile)
{
var depthCellCount = (int)Math.Ceiling(bottomProfile.MaxDepth / DepthCellSize);
var rangeCellCount = (int)Math.Ceiling(mode.MaxPropagationRadius / RangeCellSize);
var startProfile = soundSpeedProfilesAlongRadial[0].Item2;
var sourceDepth = platform.Depth;
var frequency = (float)Math.Sqrt(mode.HighFrequency * mode.LowFrequency);
if (mode.Depth.HasValue) sourceDepth += mode.Depth.Value;
var maxCalculationDepthMeters = bottomProfile.MaxDepth * 1.01;
var directoryPath = Path.GetDirectoryName(radial.BasePath);
if (directoryPath == null) throw new NullReferenceException("radial.BasePath does not point to a valid directory");
if (!Directory.Exists(directoryPath)) Directory.CreateDirectory(directoryPath);
using (var envFile = new StreamWriter(radial.BasePath + ".env", false))
{
envFile.WriteLine("Scenario: '{0}' Mode: '{2}' Analysis point: {1} Bearing: {3}",
radial.TransmissionLoss.AnalysisPoint.Scenario.Name,
radial.TransmissionLoss.AnalysisPoint.Geo,
radial.TransmissionLoss.Modes[0].ModeName,
radial.Bearing);
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0}", frequency));
envFile.WriteLine("1"); // was NMEDIA in gui_genbellhopenv.m
envFile.WriteLine(UseSurfaceReflection ? "'QFLT'" : "'QVLT'");
//if (depthCellCount < 5) throw new BathymetryTooShallowException("Error: Maximum depth of transect (" + maxCalculationDepthMeters + " meters) less than minimum required for transmission loss calculations.\nPlease choose a different location for this transect.");
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "0, 0.0, {0}", startProfile.Data[startProfile.Data.Count - 1].Depth));
foreach (var soundSpeedSample in startProfile.Data)
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1} 0.0 1.0 0.0 0.0", soundSpeedSample.Depth, soundSpeedSample.SoundSpeed));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "'A*' 0.0")); // A = Acoustic halfspace, * = read bathymetry file 'BTYFIL', 0.0 = bottom roughness (currently ignored)
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2} {3} {4} {5} /", maxCalculationDepthMeters, sedimentType.CompressionWaveSpeed, sedimentType.ShearWaveSpeed, sedimentType.Density, sedimentType.LossParameter, 0));
// Source and Receiver Depths and Ranges
envFile.WriteLine("1"); // Number of Source Depths
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} /", sourceDepth)); // source depth
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0}", depthCellCount)); // Number of Receiver Depths
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "0.0 {0} /", maxCalculationDepthMeters));
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0}", rangeCellCount)); // Number of receiver ranges
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "0.0 {0} /", mode.MaxPropagationRadius / 1000.0));
envFile.WriteLine(createArrivalsFile ? "'a'" : "'I'");
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0}", RayCount)); // Number of beams
var verticalHalfAngle = mode.VerticalBeamWidth / 2;
var angle1 = mode.DepressionElevationAngle - verticalHalfAngle;
var angle2 = mode.DepressionElevationAngle + verticalHalfAngle;
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1} /", angle1, angle2)); // Beam fan half-angles (negative angles are toward the surface
envFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "0.0 {0} {1}", maxCalculationDepthMeters, (mode.MaxPropagationRadius / 1000.0) * 1.01)); // step zbox(meters) rbox(km)
}
using (var sspFile = new StreamWriter(radial.BasePath + ".ssp", false))
{
if (soundSpeedProfilesAlongRadial.Count == 1) soundSpeedProfilesAlongRadial.Add(Tuple.Create(Geo.RadiansToKilometers(radial.Segment.LengthRadians), new SoundSpeedProfile(soundSpeedProfilesAlongRadial[0].Item2)));
sspFile.WriteLine("{0}", soundSpeedProfilesAlongRadial.Count);
foreach (var rangeProfileTuple in soundSpeedProfilesAlongRadial) sspFile.Write(string.Format(CultureInfo.InvariantCulture, "{0,-10:0.###}", rangeProfileTuple.Item1));
sspFile.WriteLine();
//sspFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0,-10:0.###}{1,-10:0.###}{2,-10:0.###}", 0.0, bottomProfile.Profile[bottomProfile.Profile.Count / 2].Range, bottomProfile.Profile[bottomProfile.Profile.Count - 1].Range));
for (var depthIndex = 0; depthIndex < startProfile.Data.Count; depthIndex++)
{
foreach (var rangeProfileTuple in soundSpeedProfilesAlongRadial) sspFile.Write(string.Format(CultureInfo.InvariantCulture, "{0,-10:0.###}", rangeProfileTuple.Item2.Data[depthIndex].SoundSpeed));
sspFile.WriteLine();
}
//sspFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0,-10:0.###}{1,-10:0.###}{2,-10:0.###}", startProfile.Data[depthIndex].SoundSpeed, middleProfile.Data[depthIndex].SoundSpeed, endProfile.Data[depthIndex].SoundSpeed));
}
using (var trcFile = new StreamWriter(radial.BasePath + ".trc", false))
{
var topReflectionCoefficients = GenerateReflectionCoefficients(windSpeed, frequency);
trcFile.WriteLine(topReflectionCoefficients.GetLength(0));
for (var rowIndex = 0; rowIndex < topReflectionCoefficients.GetLength(0); rowIndex++)
trcFile.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1} {2} ", topReflectionCoefficients[rowIndex, 0], topReflectionCoefficients[rowIndex, 1], topReflectionCoefficients[rowIndex, 2]));
}
using (var writer = new StreamWriter(radial.BasePath + ".bty")) writer.Write(bottomProfile.ToBellhopString());
// Now that we've got the files ready to go, we can launch bellhop to do the actual calculations
var bellhopProcess = new Process
{
StartInfo = new ProcessStartInfo(Path.Combine(AssemblyLocation, "bellhop.exe"), radial.Filename)
{
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardInput = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
WorkingDirectory = directoryPath
}
};
if (radial.IsDeleted) throw new RadialDeletedByUserException();
bellhopProcess.Start();
try
{
bellhopProcess.PriorityClass = ProcessPriorityClass.Idle;
}
catch (InvalidOperationException) {}
//bellhopProcess.BeginOutputReadLine();
while (!bellhopProcess.HasExited)
{
if (radial.IsDeleted)
{
bellhopProcess.Kill();
throw new RadialDeletedByUserException();
}
Thread.Sleep(20);
}
if (bellhopProcess.ExitCode == 0) return;
var bellhopOutput = bellhopProcess.StandardOutput.ReadToEnd();
var bellhopError = bellhopProcess.StandardError.ReadToEnd();
Debug.WriteLine("Bellhop process for radial {0} exited with error code {1:X}", radial.BasePath, bellhopProcess.ExitCode);
Debug.WriteLine("Bellhop stdout: " + bellhopOutput);
Debug.WriteLine("Bellhop stderr: " + bellhopError);
radial.CleanupFiles();
}
public override void CalculateTransmissionLoss(Platform platform, Mode mode, Radial radial, BottomProfile bottomProfile, SedimentType sedimentType, double windSpeed, IList<Tuple<double, SoundSpeedProfile>> soundSpeedProfilesAlongRadial)
{
CalculateTransmissionLossInternal(platform, mode, radial, bottomProfile, sedimentType, windSpeed, soundSpeedProfilesAlongRadial, false);
}