<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 21:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.03.15 (074) 21:50:00</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">
FF202607403152150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.620" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.593" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="512.253" 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="0.420" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.098" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="364.336" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.937" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.488" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.368" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.904" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="149">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 346.667 348.333 350.000 351.250 352.500 353.750 355.000 350.000 350.000 351.111 352.222 353.333 354.444 355.556 356.667 357.778 358.889 360.000 360.000 355.000 355.000 358.333 361.667 365.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 375.000 376.667 378.333 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 387.500 390.000 392.500 395.000 395.938 396.875 397.813 398.750 399.688 400.625 401.563 402.500 403.438 404.375 405.313 406.250 407.188 408.125 409.063 410.000 412.500 415.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 421.429 422.857 424.286 425.714 427.143 428.571 430.000 430.000 430.000 430.000 435.000 435.000 437.500 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 446.667 448.333 450.000 450.000 452.500 455.000 455.000 457.500 460.000 462.500 465.000 470.000 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 480.000 490.000 491.667 493.333 495.000 497.500 500.000 502.500 505.000 507.500 510.000 510.000 510.911 512.253 514.427 518.556 529.427
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 0 57 0 0 0 51 66 66 0 0 0 0 0 0 0 0 63 0 63 0 0 0 54 57 54 0 0 66 60 0 0 0 63 0 0 0 60 0 0 0 51 0 0 0 0 0 0 57 0 57 60 48 63 57 57 0 0 63 51 57 0 0 0 0 0 0 0 0 0 0 0 57 0 51 0 57 0 48 54 57 0 60 0 60 60 60 0 0 0 0 0 0 57 60 54 63 60 60 0 57 60 63 51 0 60 63 60 0 0 60 54 0 60 60 0 0 0 60 48 51 60 60 60 63 60 60 63 0 54 0 57 0 0 60 0 0 0 0 0 51 60 0 57 54 57 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 1.171875 2.734375 1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125 0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -2.734375 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.408 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.028 140.0 145.0 150.0 155.0 160.0 165.0 168.057 170.0 175.0 180.0 185.0 190.0 195.0 197.085 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.098 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.278 0.364 0.407 0.42 0.415 0.4 0.374 0.334 0.274 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.253 0.291 0.328 0.366 0.404 0.42 0.485 0.581 0.672 0.765 0.862 0.964 1.071 1.185 1.306 1.435 1.571 1.715 1.868 2.029 2.198 2.377 2.565 2.761 2.967 3.182 3.407 3.641 3.885 4.138 4.402 4.675 4.958 5.252 5.556 5.87 6.194 6.528 6.872 7.224 7.585 7.951 8.32 8.687 9.045 9.383 9.685 9.929 10.091 10.15 10.15 10.134 10.086 10.01 9.907 9.782 9.637 9.474 9.296 9.105 8.904 8.694 8.477 8.256 8.031 7.803 7.575 7.346 7.119 6.893 6.669 6.449 6.232 6.019 5.811 5.607 5.407 5.213 5.024 4.84 4.662 4.488 4.32 4.158 4.0 3.848 3.701 3.559 3.421 3.289 3.161 3.038 2.919 2.805 2.694 2.588 2.486 2.388 2.293 2.202 2.115 2.031 1.95 1.872 1.798 1.726 1.657 1.59 1.527 1.466 1.407 1.35 1.296 1.244 1.194 1.146 1.1 1.056 1.013 0.973 0.933 0.896 0.86 0.825 0.792 0.76 0.729 0.7 0.672 0.645 0.619 0.594 0.57 0.547 0.525 0.504 0.483 0.464 0.445 0.427 0.41 0.393 0.377 0.362 0.348 0.334 0.32 0.307 0.295 0.283 0.271 0.26 0.25 0.24 0.23 0.221 0.212 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.42" PeakHeight="110.0" Num="3" Error="0.0">
-20.719 3.382 -0.255
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.42" EndFrequency="10.15" PeakHeight="415.098" Num="5" zHalfNm="364.336" Error="3.578">
-191.158 -45.593 21.151 -3.988 1.575
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.085" Depth="0.22"/>
<TopsideChapman PeakHeight="415.098" PeakDensity="1278194.8" PeakScaleHeight="37.904" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
