<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 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="14.0">
<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: 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" >
2026.10.26 (299) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629910262130009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.744" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.264" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="7.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="481.489" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.615" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.980" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.860" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.313" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.756" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.521" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 452.143 454.286 456.429 458.571 460.714 462.857 465.000 470.000 470.000 475.000 481.489 489.768
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 75 75 72 75 75 75 75 75 72 0 69 72 60 66 75 72 75 66 72 60 69 75 69 63 63 72 69 72 69 69 63 0 0 72 0 0 0 72 66 72 69 66 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 -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 1.171875 -0.390625 2.734375 1.953125 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="167">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.587 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.235 140.0 145.0 150.0 155.0 160.0 165.0 168.471 170.0 175.0 180.0 185.0 190.0 195.0 197.706 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.615 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.352 0.393 0.406 0.401 0.388 0.363 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.246 0.281 0.316 0.352 0.387 0.406 0.456 0.549 0.639 0.736 0.841 0.96 1.093 1.244 1.412 1.598 1.801 2.018 2.246 2.484 2.729 2.98 3.234 3.493 3.754 4.018 4.285 4.553 4.824 5.097 5.371 5.646 5.922 6.196 6.466 6.73 6.983 7.218 7.425 7.592 7.704 7.749 7.75 7.741 7.709 7.657 7.587 7.5 7.398 7.283 7.157 7.021 6.877 6.727 6.571 6.411 6.247 6.082 5.915 5.748 5.58 5.414 5.249 5.085 4.924 4.765 4.609 4.456 4.306 4.159 4.016 3.877 3.741 3.609 3.481 3.356 3.235 3.118 3.004 2.894 2.788 2.685 2.585 2.489 2.396 2.306 2.22 2.136 2.056 1.978 1.903 1.831 1.761 1.694 1.63 1.568 1.508 1.45 1.394 1.341 1.29 1.24 1.192 1.147 1.102 1.06 1.019 0.98 0.942 0.906 0.871 0.837 0.805 0.774 0.744 0.715 0.688 0.661 0.635 0.611 0.587 0.565 0.543 0.522 0.501 0.482 0.463 0.445 0.428 0.412 0.396 0.38 0.366 0.351 0.338 0.325 0.312 0.3 0.288 0.277 0.267 0.256 0.246 0.237 0.228 0.219 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.406" PeakHeight="110.0" Num="3" Error="0.0">
-20.373 3.189 -0.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.406" EndFrequency="7.75" PeakHeight="375.615" Num="5" zHalfNm="321.98" Error="3.418">
-167.818 -19.953 13.707 -6.816 2.971
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.706" Depth="0.206"/>
<TopsideChapman PeakHeight="375.615" PeakDensity="745192.3" PeakScaleHeight="39.521" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
