<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 22:40:00.000"
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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.24 (297) 22:40:00</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">
FF202629710242240009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.853" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.399" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.916" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="345.050" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.085" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="62.646" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.473" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.496" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 383.333 381.667 380.000 375.000 375.714 376.429 377.143 377.857 378.571 379.286 380.000 380.000 380.000 383.077 386.154 389.231 392.308 395.385 398.462 401.538 404.615 407.692 410.769 413.846 416.923 420.000 423.077 426.154 429.231 432.308 435.385 438.462 441.538 444.615 447.692 450.769 453.846 456.923 460.000 456.429 452.857 449.286 445.714 442.143 438.571 435.000 435.000 434.545 434.091 433.636 433.182 432.727 432.273 431.818 431.364 430.909 430.455 430.000 430.000 440.000 440.000 442.753 450.000 521.742
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 63 66 72 0 0 66 69 66 63 69 69 63 63 0 0 0 0 57 0 0 0 0 0 0 57 0 57 0 0 0 0 0 0 57 0 0 54 66 60 0 0 0 0 0 54 54 54 0 0 0 51 0 0 57 0 57 0 54 54 54 51 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -1.953125 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -2.734375 -1.953125 -1.171875 -1.953125 1.953125 2.734375 -2.734375 1.171875 2.734375 1.953125 1.171875 1.953125 -0.390625 1.953125 2.734375 -0.390625 0.390625 -0.390625 -1.171875 2.734375 -2.734375 -1.171875 1.171875 1.171875 2.734375 2.734375 -0.390625 1.171875 2.734375 2.734375 0.390625 -1.171875 -1.953125 2.734375 -1.953125 -2.734375 2.734375 -1.953125 2.734375 2.734375 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="141">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.913 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.827 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.74 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.916 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.233 0.255 0.278 0.301 0.323 0.346 0.354 0.408 0.489 0.576 0.674 0.785 0.912 1.055 1.212 1.38 1.557 1.739 1.926 2.116 2.307 2.501 2.696 2.893 3.093 3.294 3.499 3.707 3.918 4.134 4.355 4.581 4.814 5.053 5.301 5.558 5.826 6.105 6.396 6.693 6.974 7.145 7.15 7.137 7.088 7.007 6.898 6.765 6.613 6.444 6.263 6.071 5.873 5.67 5.464 5.257 5.051 4.846 4.644 4.446 4.253 4.064 3.881 3.704 3.532 3.366 3.207 3.054 2.907 2.766 2.631 2.502 2.378 2.26 2.148 2.041 1.938 1.841 1.748 1.66 1.576 1.496 1.42 1.348 1.279 1.214 1.152 1.093 1.037 0.984 0.933 0.885 0.84 0.797 0.756 0.717 0.68 0.645 0.612 0.58 0.551 0.522 0.495 0.47 0.446 0.423 0.401 0.38 0.361 0.342 0.324 0.308 0.292 0.277 0.262 0.249 0.236 0.224 0.212 0.201

</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="7.15" PeakHeight="385.916" Num="5" zHalfNm="345.05" Error="3.776">
-150.263 -44.248 29.959 -13.116 3.492
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.74" Depth="0.154"/>
<TopsideChapman PeakHeight="385.916" PeakDensity="634274.2" PeakScaleHeight="29.496" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
