<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 23:10:00.000"
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="12.0">
<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 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.21 (294) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410212310009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.868" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.787" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.050" Name="fxI" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="363.653" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="320.284" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.850" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.124" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.488" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="32.470" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="68.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="57">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 357.857 360.714 363.571 366.429 369.286 372.143 375.000 375.000 375.625 376.250 376.875 377.500 378.125 378.750 379.375 380.000 380.000 380.000 377.500 375.000 372.500 370.000 369.643 369.286 368.929 368.571 368.214 367.857 367.500 367.143 366.786 366.429 366.071 365.714 365.357 365.000 365.000 366.667 368.333 370.000 377.335 384.670 392.005 399.340 406.675 414.010 421.345 428.680 429.758 431.201 433.234 436.312 440.000 450.000 486.845
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 63 60 0 0 0 0 63 69 0 0 0 0 0 0 72 0 66 75 66 0 72 66 0 63 57 0 60 57 0 0 0 0 0 0 0 0 0 0 0 0 0 57 60 0 0 0 0 0 0 0 60 0 0 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 2.734375 1.171875 1.171875 0.390625 -1.953125 2.734375 1.953125 1.953125 1.953125 2.734375 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 2.734375 1.953125 1.953125 1.171875 1.953125 2.734375 1.953125 2.734375 1.953125 2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 1.953125 1.171875 1.953125 2.734375 2.734375 1.171875 1.953125 2.734375 0.390625 2.734375 -0.390625 1.953125 1.953125 0.390625 1.953125 1.171875 1.171875 1.171875 0.390625 -0.390625 0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="142">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.964 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.927 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.891 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.653 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.244 0.266 0.288 0.31 0.332 0.354 0.355 0.424 0.512 0.62 0.747 0.891 1.048 1.216 1.396 1.585 1.784 1.993 2.211 2.439 2.678 2.926 3.185 3.453 3.732 4.019 4.314 4.614 4.918 5.221 5.517 5.798 6.054 6.27 6.433 6.529 6.55 6.549 6.527 6.478 6.405 6.312 6.201 6.076 5.937 5.789 5.632 5.47 5.302 5.132 4.96 4.788 4.617 4.446 4.278 4.113 3.951 3.792 3.638 3.488 3.342 3.2 3.063 2.931 2.804 2.681 2.563 2.449 2.34 2.235 2.134 2.038 1.945 1.857 1.772 1.691 1.613 1.539 1.468 1.401 1.336 1.274 1.215 1.158 1.105 1.053 1.004 0.957 0.913 0.87 0.83 0.791 0.754 0.719 0.685 0.653 0.622 0.593 0.565 0.539 0.514 0.49 0.467 0.445 0.424 0.404 0.385 0.367 0.35 0.333 0.318 0.303 0.289 0.275 0.262 0.25 0.238 0.227 0.216 0.206

</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="6.55" PeakHeight="363.653" Num="5" zHalfNm="320.284" Error="3.546">
-138.817 -16.758 9.925 -2.984 -0.128
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.891" Depth="0.154"/>
<TopsideChapman PeakHeight="363.653" PeakDensity="532289.06" PeakScaleHeight="32.47" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
