<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 23:40:00.000"
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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, F2o cusp not found, 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" >
2026.10.23 (296) 23:40:00</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">
FF202629610232340009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.856" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.709" 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="51" Val="8.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="432.442" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="362.652" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="312.735" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.682" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.103" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.258" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.845" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="72.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="83">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 300.000 300.000 300.000 302.300 304.600 306.900 309.200 311.500 313.800 316.100 318.400 320.700 323.000 325.300 327.600 329.900 332.200 334.500 336.800 339.100 341.400 343.700 346.000 348.300 350.600 352.900 355.200 357.500 359.800 362.100 364.400 366.700 369.000 371.300 373.600 375.900 378.200 380.500 382.800 385.100 387.400 389.700 392.000 394.300 396.600 398.900 401.200 403.500 405.800 408.100 410.400 412.700 415.000 420.000 420.299 420.631 421.000 421.414 421.881 422.411 423.020 423.725 424.552 425.535 426.722 428.185 430.034 432.442 435.710 440.397 447.687 460.576 489.543
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 60 60 63 60 60 66 69 0 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 54 0 0 0 0 0 0 54 57 54 57 0 0 54 54 0 0 57 0 0 0 0 0 0 0 0 0 54
</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 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 0.390625 0.390625 -1.171875 -1.171875 -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 -1.171875 -0.390625 0.390625 0.390625 -1.171875 -0.390625 0.390625 -0.390625 2.734375 -1.953125 1.171875 1.171875 -1.171875 -2.734375 0.390625 0.390625 0.390625 -1.171875 -1.171875 0.390625 0.390625 0.390625 0.390625 -1.953125 -1.171875 0.390625 0.390625 -1.171875 2.734375 1.171875 -1.171875 0.390625 1.953125 1.171875 2.734375 0.390625 2.734375 1.171875 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="157">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.734 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.468 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.202 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 362.652 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</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 0.332 0.314 0.289 0.255 0.208 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.237 0.258 0.28 0.301 0.323 0.345 0.354 0.428 0.529 0.632 0.748 0.885 1.051 1.254 1.501 1.789 2.111 2.452 2.801 3.152 3.502 3.848 4.191 4.53 4.865 5.195 5.521 5.839 6.148 6.444 6.724 6.981 7.206 7.389 7.521 7.59 7.6 7.597 7.572 7.523 7.452 7.362 7.256 7.135 7.001 6.856 6.703 6.543 6.377 6.207 6.034 5.859 5.683 5.507 5.332 5.158 4.986 4.816 4.649 4.486 4.326 4.169 4.016 3.868 3.723 3.583 3.446 3.314 3.187 3.063 2.943 2.828 2.716 2.609 2.505 2.405 2.309 2.216 2.127 2.041 1.959 1.879 1.803 1.729 1.659 1.591 1.526 1.464 1.404 1.346 1.291 1.238 1.187 1.138 1.091 1.046 1.003 0.962 0.922 0.884 0.847 0.812 0.779 0.746 0.716 0.686 0.658 0.63 0.604 0.579 0.555 0.532 0.51 0.489 0.469 0.449 0.431 0.413 0.396 0.379 0.363 0.348 0.334 0.32 0.307 0.294 0.282 0.27 0.259 0.248 0.238 0.228 0.219 0.21 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="7.6" PeakHeight="362.652" Num="5" zHalfNm="312.735" Error="5.142">
-146.314 -2.606 5.506 -5.151 3.115
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.202" Depth="0.154"/>
<TopsideChapman PeakHeight="362.652" PeakDensity="716625.3" PeakScaleHeight="36.845" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
