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    Fw: Somewhere in the Pacific
    From: Andrés Ruiz
    Date: 2008 Dec 25, 10:40 +0100
    The fix for near limb observations:
    B = 21.26958º N
    L = 156.218458º W
     
    Input data:
    Be
    20.0
    Le
    -160.0
    IE
    0
    hEye[m]
    3.6576
    T[ºC]
    10
    P[hPa]
    1009.144
    LDobs1
    63.51
    LDobs2
    27.85
    GHAmoon1-12:00UT-22/06/2008
    134.876173
    DECmoon1
    -17.261033
    HPmoon1
    0.9238588
    SDmoon1
    0.251735167
    GHAstar1-Antares
    203.551253
    DECstar1
    -26.453262
    SDstar1
    0
    GHAmoon2
    134.876173
    DECmoon2
    -17.261033
    HPmoon2
    0.9238588
    SDmoon2
    0.251735167
    GHAstar2-Fomalhaut
    106.506820
    DECstar2
    -29.573826
    SDstar2
    0
     
    Output:

    iter

    B

    L

    M

    m

    S

    s

    LDtrue

    LDclear

    dLDcldB

    dLDcldL

    Z

    p

     

    dif LD

    1

    20

    -160

    45.315292

    44.674163

    27.218422

    27.249892

    63.698208

    63.635674

    0.007064

    0.014007

    64.643217

    3.790936

     

    0.062534

    1

    20

    -160

    45.315292

    44.674163

    18.50617

    18.554528

    28.687464

    28.726873

    0.005524

    -0.012199

    -66.949811

    -2.793292

     

    -0.039409

    2

    20.021485

    -159.936421

    45.332139

    44.691193

    27.161497

    27.193044

    63.698208

    63.636717

    0.007061

    0.014014

    64.665993

    3.726246

     

    0.061491

    2

    20.021485

    -159.936421

    45.332139

    44.691193

    18.535672

    18.583948

    28.687464

    28.726216

    0.00552

    -0.0122

    -66.970117

    -2.746535

     

    -0.038752

    3

    20.0426

    -159.87392

    45.348612

    44.707846

    27.10553

    27.137153

    63.698208

    63.637742

    0.007058

    0.01402

    64.688378

    3.662685

     

    0.060466

    3

    20.0426

    -159.87392

    45.348612

    44.707846

    18.564634

    18.612829

    28.687464

    28.72557

    0.005516

    -0.012201

    -66.989976

    -2.700555

     

    -0.038106

    4

    20.063353

    -159.812479

    45.364722

    44.724132

    27.050503

    27.082201

    63.698208

    63.63875

    0.007055

    0.014026

    64.710377

    3.600233

     

    0.059458

    4

    20.063353

    -159.812479

    45.364722

    44.724132

    18.593065

    18.641181

    28.687464

    28.724934

    0.005512

    -0.012202

    -67.009397

    -2.655342

     

    -0.03747

    5

    20.083748

    -159.752078

    45.380477

    44.740059

    26.996402

    27.028174

    63.698208

    63.639741

    0.007052

    0.014032

    64.731999

    3.538868

     

    0.058467

    5

    20.083748

    -159.752078

    45.380477

    44.740059

    18.620977

    18.669015

    28.687464

    28.72431

    0.005508

    -0.012203

    -67.028394

    -2.610881

     

    -0.036846

    6

    20.103794

    -159.692701

    45.395886

    44.755636

    26.943209

    26.975055

    63.698208

    63.640716

    0.007049

    0.014038

    64.753249

    3.478572

     

    0.057492

    6

    20.103794

    -159.692701

    45.395886

    44.755636

    18.648377

    18.69634

    28.687464

    28.723695

    0.005504

    -0.012204

    -67.046975

    -2.567161

     

    -0.036231

    7

    20.123495

    -159.634329

    45.410958

    44.770872

    26.890911

    26.922829

    63.698208

    63.641674

    0.007046

    0.014044

    64.774133

    3.419325

     

    0.056534

    7

    20.123495

    -159.634329

    45.410958

    44.770872

    18.675278

    18.723167

    28.687464

    28.723091

    0.0055

    -0.012205

    -67.065151

    -2.524171

     

    -0.035627

    8

    20.142859

    -159.576945

    45.4257

    44.785776

    26.839492

    26.87148

    63.698208

    63.642617

    0.007044

    0.014049

    64.794659

    3.361107

     

    0.055591

    8

    20.142859

    -159.576945

    45.4257

    44.785776

    18.701689

    18.749504

    28.687464

    28.722497

    0.005497

    -0.012206

    -67.082934

    -2.481898

     

    -0.035033

    9

    20.16189

    -159.520532

    45.440121

    44.800354

    26.788936

    26.820995

    63.698208

    63.643544

    0.007041

    0.014055

    64.814833

    3.303902

     

    0.054664

    9

    20.16189

    -159.520532

    45.440121

    44.800354

    18.727618

    18.775363

    28.687464

    28.721913

    0.005493

    -0.012207

    -67.10033

    -2.44033

     

    -0.034449

    10

    20.180596

    -159.465075

    45.454229

    44.814616

    26.73923

    26.771358

    63.698208

    63.644455

    0.007038

    0.014061

    64.83466

    3.247689

     

    0.053753

    10

    20.180596

    -159.465075

    45.454229

    44.814616

    18.753076

    18.800751

    28.687464

    28.721339

    0.00549

    -0.012208

    -67.117352

    -2.399457

     

    -0.033875

    360

    21.266584

    -156.227439

    46.155978

    45.524095

    23.827228

    23.86388

    63.698208

    63.698058

    0.006879

    0.014386

    65.981344

    0.008865

     

    0.00015

    360

    21.266584

    -156.227439

    46.155978

    45.524095

    20.180878

    20.224916

    28.687464

    28.687558

    0.005336

    -0.012292

    -67.9742

    -0.006635

     

    -9.4E-05

    384

    21.267579

    -156.224458

    46.156512

    45.524635

    23.824538

    23.861195

    63.698208

    63.698108

    0.006879

    0.014386

    65.982388

    0.005922

     

    0.0001

    384

    21.267579

    -156.224458

    46.156512

    45.524635

    20.182138

    20.226174

    28.687464

    28.687527

    0.005336

    -0.012292

    -67.974867

    -0.004433

     

    -6.3E-05

    385

    21.267612

    -156.224358

    46.15653

    45.524653

    23.824448

    23.861105

    63.698208

    63.698109

    0.006879

    0.014386

    65.982423

    0.005823

     

    9.9E-05

    385

    21.267612

    -156.224358

    46.15653

    45.524653

    20.18218

    20.226216

    28.687464

    28.687526

    0.005336

    -0.012292

    -67.97489

    -0.004359

     

    -6.2E-05

    744

    21.269576

    -156.218472

    46.157584

    45.525719

    23.819138

    23.855804

    63.698208

    63.698207

    0.006879

    0.014387

    65.984483

    0.000014

     

    1E-06

    744

    21.269576

    -156.218472

    46.157584

    45.525719

    20.184669

    20.228698

    28.687464

    28.687464

    0.005336

    -0.012293

    -67.976206

    -0.00001

     

    0

    1000

    21.26958

    -156.218458

    46.157586

    45.525722

    23.819125

    23.855791

    63.698208

    63.698208

    0.006879

    0.014387

    65.984488

    0

     

    0

    1000

    21.26958

    -156.218458

    46.157586

    45.525722

    20.184675

    20.228704

    28.687464

    28.687464

    0.005336

    -0.012293

    -67.976209

    0

     

    0

      

    Dave, I hope, now is correct. The chart shows the AP and the obtained fix, near Hawaii.

    Andrés Ruiz
    Navigational Algorithms
    http://www.geocities.com/andresruizgonzalez/
     

    De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de d walden
    Enviado el: domingo, 15 de junio de 2008 5:35
    Para: navlist
    Asunto: [NavList 5456] Fw: Somewhere in the Pacific

    It's 1200GMT 22 June 2008.  You think you're somewhere north of Hawaii within 200 miles.  No horizon visible.  You get two quick lunar distances (very quick, both at 1200.) Moon near to Fomalhaut 27 deg 51.0 min and moon near to Antares 63 deg 30.6 min.  IC zero.  Ht of eye 12 ft.  T 50 deg F. Pres 29.80 inches.

    Luckly, while you don't have GPS, you do have a computerized Lunar Calculator program. 

    Where are you?


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