<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 22:50:00.000"
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="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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.10.24 (297) 22:50:00</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">
FF202629710242250009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.004" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.528" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="351.429" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="356.019" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="319.656" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.998" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="54.220" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.443" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.737" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="59.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 405.000 400.000 390.000 385.000 380.000 375.000 370.000 365.000 360.000 356.667 353.333 350.000 348.333 346.667 345.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 348.333 346.667 345.000 345.000 345.000 345.000 345.000 345.000 350.000 355.000 354.500 354.000 353.500 353.000 352.500 352.000 351.500 351.000 350.500 350.000 347.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 342.500 340.000 340.000 340.000 340.000 341.905 343.810 345.714 347.619 349.524 351.429 415.000 415.113 415.244 415.397 415.578 415.796 416.065 416.402 416.839 417.428 418.263 419.543 421.748 426.450 443.435
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 57 60 60 0 0 63 0 54 0 0 63 0 57 60 63 0 0 57 66 57 54 57 57 0 54 57 0 60 54 0 57 57 57 54 0 57 57 0 0 57 0 0 63 0 63 60 0 60 63 0 0 60 57 60 63 60 63 54 60 60 57 57 60 57 0 0 0 0 0 57 0 0 0 0 0 57 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 1.953125 -1.171875 2.734375 2.734375 -0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 0.390625 0.390625 1.953125 1.171875 0.390625 0.390625 -0.390625 2.734375 2.734375 1.171875 -1.953125 2.734375 2.734375 0.390625 -0.390625 1.171875 -1.953125 0.390625 0.390625 1.171875 1.171875 1.171875 -1.171875 0.390625 1.171875 1.171875 2.734375 1.171875 -0.390625 1.171875 1.171875 1.171875 1.953125 0.390625 -0.390625 0.390625 1.171875 -1.171875 1.953125 1.953125 -1.953125 -2.734375 -1.953125 1.171875 1.171875 -0.390625 2.734375 -1.171875 0.390625 -2.734375 2.734375 -1.171875 -1.953125 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="131">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.294 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.587 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.881 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.019 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.31 0.283 0.245 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.229 0.251 0.274 0.296 0.319 0.341 0.354 0.377 0.453 0.57 0.726 0.898 1.072 1.247 1.426 1.61 1.802 2.002 2.213 2.437 2.676 2.931 3.204 3.499 3.816 4.158 4.526 4.919 5.332 5.759 6.184 6.587 6.944 7.227 7.417 7.498 7.5 7.485 7.428 7.334 7.207 7.053 6.877 6.683 6.475 6.258 6.033 5.804 5.574 5.343 5.114 4.889 4.668 4.452 4.242 4.039 3.842 3.652 3.47 3.295 3.127 2.967 2.813 2.667 2.528 2.395 2.268 2.148 2.034 1.925 1.822 1.724 1.632 1.544 1.46 1.381 1.307 1.236 1.169 1.105 1.045 0.988 0.934 0.884 0.835 0.79 0.747 0.706 0.667 0.631 0.596 0.564 0.533 0.504 0.476 0.45 0.426 0.402 0.38 0.36 0.34 0.321 0.304 0.287 0.271 0.256 0.242 0.229 0.217 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.5" PeakHeight="356.019" Num="5" zHalfNm="319.656" Error="6.655">
-129.272 -21.972 10.42 0.134 -2.448
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.881" Depth="0.154"/>
<TopsideChapman PeakHeight="356.019" PeakDensity="697890.8" PeakScaleHeight="27.737" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
