<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 09:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.12 (071) 09:30:00</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">
FF202607103120930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.323" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.590" 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="7.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="316.920" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.657" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="272.440" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="217.433" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.210" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.718" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.835" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.095" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 257.500 260.000 257.500 255.000 255.000 257.500 260.000 260.000 260.000 261.667 263.333 265.000 265.000 260.000 260.000 262.500 265.000 265.000 267.500 270.000 275.000 275.000 275.000 270.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 307.364 310.078 313.225 316.920 321.318 326.640 333.213 341.537 352.417 367.246 388.649 422.246 482.603
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 66 0 57 57 0 69 0 69 66 60 63 60 60 0 60 60 69 63 66 0 69 66 66 63 0 69 63 0 66 63 75 0 0 0 78 75 0 78 78 78 0 0 69 72 75 0 0 72 0 0 69 60 0 54 0 69 63 60 63 63 57 66 54 0 66 51 60 60 60 66 63 66 69 69 72 69 72 72 75 75 72 69 63 69 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 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 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 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.871 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.221 125.0 130.0 130.443 135.0 140.0 140.664 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 272.44 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.211 1.109 1.435 1.604 1.657 1.624 1.522 1.516 1.516 1.516 1.516 1.579 1.648 1.657 1.82 1.981 2.134 2.284 2.437 2.595 2.761 2.937 3.127 3.335 3.565 3.823 4.116 4.45 4.826 5.229 5.624 5.975 6.268 6.504 6.69 6.835 6.944 7.022 7.072 7.097 7.1 7.098 7.08 7.047 6.999 6.938 6.865 6.781 6.688 6.586 6.477 6.361 6.24 6.115 5.986 5.854 5.72 5.584 5.447 5.309 5.172 5.035 4.899 4.763 4.63 4.497 4.367 4.239 4.113 3.989 3.867 3.749 3.632 3.519 3.408 3.3 3.194 3.092 2.992 2.894 2.8 2.708 2.619 2.532 2.448 2.367 2.288 2.211 2.137 2.065 1.995 1.928 1.862 1.799 1.738 1.679 1.621 1.566 1.512 1.461 1.41 1.362 1.315 1.27 1.226 1.184 1.143 1.104 1.066 1.029 0.993 0.959 0.926 0.894 0.863 0.833 0.804 0.776 0.749 0.723 0.698 0.674 0.651 0.628 0.606 0.585 0.565 0.545 0.526 0.508 0.49 0.473 0.457 0.441 0.426 0.411 0.397 0.383 0.369 0.357 0.344 0.332 0.321 0.31 0.299 0.288 0.278 0.269 0.259 0.25 0.242 0.233 0.225 0.217 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.657" PeakHeight="110.0" Num="3" Error="0.0">
-28.469 10.324 -1.984
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.657" EndFrequency="7.1" PeakHeight="272.44" Num="5" zHalfNm="217.433" Error="3.152">
-125.424 -0.431 -12.259 6.738 -0.4
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.664" Depth="0.141"/>
<TopsideChapman PeakHeight="272.44" PeakDensity="625434.25" PeakScaleHeight="44.095" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
