<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 21:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.13 (072) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202607203132130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.738" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.313" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="472.182" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.683" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="374.914" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="323.135" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.170" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.885" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.081" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.491" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="164">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 305.000 306.667 308.333 310.000 310.000 311.000 312.000 313.000 314.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.625 326.250 326.875 327.500 328.125 328.750 329.375 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 345.000 345.000 345.000 345.000 346.667 348.333 350.000 351.667 353.333 355.000 355.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 366.667 368.333 370.000 371.250 372.500 373.750 375.000 376.250 377.500 378.750 380.000 380.000 380.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 390.000 395.000 392.500 390.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 462.516 465.341 468.537 472.182 476.377 481.256 487.004 493.874 502.229
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 0 66 66 0 0 0 0 0 0 0 0 0 0 63 66 66 66 66 66 0 0 60 0 0 0 0 0 0 0 63 66 66 0 0 0 69 69 66 0 0 69 0 0 60 0 0 0 66 0 0 60 63 0 0 69 0 0 63 0 0 54 0 0 63 0 66 69 0 57 63 0 63 0 69 60 0 66 72 54 72 0 0 72 0 57 0 63 0 0 0 57 0 63 0 69 0 60 0 69 69 0 60 63 0 72 57 0 69 69 69 60 69 66 66 57 63 0 66 57 63 66 69 69 63 66 54 60 63 63 54 57 60 54 57 60 54 57 60 51 57 48 54 57 51 0 0 48 0 48 0 0 48 45 51 48 48 0 0 0 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.817 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.243 140.0 145.0 150.0 155.0 160.0 160.485 165.0 170.0 175.0 180.0 185.0 185.728 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 374.914 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.453 0.592 0.661 0.683 0.673 0.642 0.587 0.501 0.357 0.347 0.347 0.347 0.347 0.347 0.347 0.347 0.407 0.474 0.54 0.607 0.673 0.683 0.822 0.968 1.116 1.27 1.432 1.606 1.791 1.99 2.201 2.426 2.665 2.917 3.182 3.46 3.75 4.052 4.366 4.691 5.027 5.374 5.732 6.1 6.478 6.865 7.262 7.667 8.081 8.501 8.927 9.355 9.781 10.201 10.604 10.979 11.309 11.572 11.742 11.8 11.8 11.78 11.725 11.638 11.521 11.378 11.213 11.028 10.825 10.608 10.379 10.14 9.893 9.64 9.383 9.123 8.861 8.6 8.339 8.08 7.823 7.57 7.32 7.075 6.835 6.599 6.369 6.145 5.926 5.713 5.506 5.305 5.11 4.921 4.738 4.561 4.389 4.224 4.063 3.909 3.759 3.615 3.476 3.342 3.213 3.089 2.969 2.853 2.742 2.635 2.532 2.433 2.338 2.246 2.158 2.073 1.991 1.913 1.838 1.765 1.695 1.628 1.564 1.502 1.443 1.386 1.331 1.278 1.228 1.179 1.132 1.087 1.044 1.003 0.963 0.925 0.888 0.853 0.819 0.786 0.755 0.725 0.696 0.669 0.642 0.617 0.592 0.569 0.546 0.524 0.503 0.483 0.464 0.446 0.428 0.411 0.395 0.379 0.364 0.349 0.335 0.322 0.309 0.297 0.285 0.274 0.263 0.253 0.242 0.233 0.224 0.215 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.683" PeakHeight="110.0" Num="3" Error="0.0">
-24.507 6.052 -0.728
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.683" EndFrequency="11.8" PeakHeight="374.914" Num="5" zHalfNm="323.135" Error="2.532">
-171.156 -31.712 16.248 -4.1 1.534
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="75.728" Depth="0.336"/>
<TopsideChapman PeakHeight="374.914" PeakDensity="1727543.4" PeakScaleHeight="38.491" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
