<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 23:00:00.000"
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, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.10.23 (296) 23:00:00</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">
FF202629610232300009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.043" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.386" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="331.459" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.920" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="58.287" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.029" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.594" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.830" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 375.000 373.333 371.667 370.000 370.000 370.000 365.000 363.333 361.667 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.455 380.909 381.364 381.818 382.273 382.727 383.182 383.636 384.091 384.545 385.000 380.000 375.000 375.000 375.000 368.333 361.667 355.000 360.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 371.000 372.000 373.000 374.000 375.000 376.000 377.000 378.000 379.000 380.000 381.000 382.000 383.000 384.000 385.000 386.000 387.000 388.000 389.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 375.000 378.337 382.601 388.243 396.058 407.601 426.376 462.275 558.379
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 69 0 0 63 0 60 0 0 0 57 63 0 69 72 72 66 72 0 63 66 0 63 0 69 0 0 0 0 63 0 0 0 0 0 0 0 63 0 0 54 57 66 69 69 69 69 66 66 0 0 0 69 0 66 66 69 0 63 63 66 63 60 0 57 0 0 0 60 63 0 60 63 57 0 0 0 0 60 63 0 0 63 60 54 57 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 -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 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 0.390625 0.390625 -1.953125 -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 2.734375 -0.390625 1.953125 -0.390625 -1.171875 -0.390625 1.171875 -0.390625 0.390625 0.390625 -0.390625 1.953125 -0.390625 -1.171875 -1.171875 1.171875 1.171875 0.390625 0.390625 1.953125 -0.390625 0.390625 0.390625 2.734375 -0.390625 2.734375 1.171875 1.171875 1.171875 -0.390625 0.390625 0.390625 1.171875 2.734375 1.953125 1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="140">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.643 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.285 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.928 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.386 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0
</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 0.331 0.311 0.284 0.248 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.203 0.225 0.248 0.27 0.292 0.314 0.337 0.354 0.364 0.427 0.522 0.659 0.82 0.989 1.159 1.331 1.505 1.685 1.871 2.064 2.266 2.479 2.703 2.94 3.192 3.459 3.744 4.049 4.373 4.719 5.085 5.471 5.871 6.279 6.682 7.062 7.396 7.661 7.834 7.9 7.9 7.882 7.824 7.732 7.609 7.461 7.291 7.104 6.903 6.692 6.473 6.249 6.022 5.794 5.567 5.342 5.12 4.902 4.689 4.482 4.28 4.085 3.896 3.714 3.539 3.37 3.209 3.053 2.905 2.763 2.627 2.497 2.373 2.255 2.142 2.035 1.933 1.835 1.743 1.655 1.571 1.491 1.415 1.343 1.275 1.21 1.148 1.09 1.034 0.981 0.931 0.883 0.838 0.795 0.754 0.716 0.679 0.644 0.611 0.58 0.55 0.522 0.495 0.47 0.445 0.423 0.401 0.38 0.361 0.342 0.325 0.308 0.292 0.277 0.263 0.249 0.236 0.224 0.213 0.202

</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="7.9" PeakHeight="370.386" Num="5" zHalfNm="331.459" Error="5.781">
-140.863 -25.524 13.325 -0.983 -2.413
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.928" Depth="0.154"/>
<TopsideChapman PeakHeight="370.386" PeakDensity="774317.6" PeakScaleHeight="29.594" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
