<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 14:10:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.25 (084) 14:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608403251410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.686" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.997" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="471.718" 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="3.375" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.353" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.420" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.732" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.773" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.864" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.279" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.537" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 311.667 313.333 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 346.667 348.333 350.000 355.000 355.000 360.000 361.667 363.333 365.000 365.000 370.000 365.000 370.000 375.000 377.500 380.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 462.516 465.280 468.332 471.718 475.497 479.741 484.542 490.017 496.318 503.648 512.282 522.600
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 0 51 54 0 48 51 54 57 60 57 57 57 60 60 54 57 57 57 57 60 0 60 60 57 63 60 54 0 57 57 57 57 0 0 48 57 57 60 0 0 60 60 57 63 54 63 54 63 63 63 66 57 60 60 63 54 57 51 60 57 63 63 66 63 63 63 60 54 63 60 66 63 54 60 54 57 54 57 57 54 54 57 57 54 54 51 48 45 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 1.953125 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.486 90.0 95.0 100.0 105.0 110.0 111.611 113.222 114.833 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.42 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.271 2.921 3.265 3.375 3.252 3.252 3.375 3.383 3.595 3.77 3.929 4.081 4.228 4.373 4.517 4.662 4.807 4.953 5.101 5.25 5.401 5.554 5.709 5.866 6.025 6.186 6.348 6.512 6.678 6.845 7.014 7.184 7.355 7.527 7.701 7.875 8.051 8.227 8.405 8.584 8.763 8.943 9.122 9.301 9.476 9.645 9.801 9.933 10.022 10.05 10.05 10.043 10.025 9.997 9.96 9.913 9.858 9.794 9.723 9.646 9.561 9.471 9.376 9.275 9.17 9.061 8.948 8.832 8.714 8.592 8.469 8.343 8.216 8.088 7.959 7.829 7.698 7.567 7.437 7.306 7.175 7.045 6.915 6.787 6.659 6.532 6.406 6.281 6.157 6.035 5.914 5.795 5.677 5.56 5.445 5.332 5.221 5.111 5.003 4.896 4.792 4.689 4.588 4.488 4.391 4.295 4.201 4.108 4.018 3.929 3.842 3.756 3.672 3.59 3.509 3.43 3.353 3.277 3.203 3.131 3.059 2.99 2.922 2.855 2.79 2.726 2.663 2.602 2.542 2.484 2.427 2.371 2.316 2.262 2.21 2.159 2.109 2.06 2.012 1.966 1.92 1.875 1.832 1.789 1.747 1.707 1.667 1.628 1.59 1.553 1.517 1.481 1.446 1.413 1.38 1.347 1.316 1.285 1.255 1.225 1.197 1.169 1.141 1.115 1.088 1.063 1.038 1.014 0.99 0.967 0.944 0.922 0.9 0.879 0.858 0.838 0.818 0.799 0.78 0.762 0.744 0.727 0.71 0.693 0.677 0.661

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.375" PeakHeight="110.0" Num="3" Error="0.0">
-30.489 13.135 -3.16
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.375" EndFrequency="10.05" PeakHeight="324.42" Num="5" zHalfNm="232.732" Error="4.701">
-168.255 -58.547 18.318 -2.75 1.647
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.833" Depth="0.123"/>
<TopsideChapman PeakHeight="324.42" PeakDensity="1253132.8" PeakScaleHeight="65.537" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
