<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 06:20:00.000"
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="15.0">
<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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.18 (291) 06:20:00</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">
FF202629110180620009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.766" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.766" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.522" 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="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="378.622" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="320.900" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.414" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.751" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.418" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.387" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.050" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 421.622 423.490 425.662 428.221 431.280 435.000 439.623 445.522 453.310 464.069 479.898 505.486 553.879
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 69 63 0 60 63 60 63 63 57 51 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="169">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.793 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.587 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.38 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.622 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0
</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 0.285 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.224 0.246 0.268 0.29 0.312 0.335 0.354 0.362 0.429 0.504 0.589 0.684 0.79 0.909 1.04 1.185 1.343 1.513 1.697 1.892 2.099 2.316 2.542 2.775 3.014 3.257 3.502 3.746 3.988 4.224 4.452 4.669 4.873 5.06 5.227 5.373 5.494 5.589 5.655 5.692 5.7 5.699 5.688 5.664 5.627 5.579 5.521 5.454 5.378 5.296 5.207 5.113 5.015 4.913 4.808 4.7 4.59 4.479 4.368 4.256 4.144 4.032 3.921 3.81 3.701 3.594 3.488 3.383 3.281 3.18 3.082 2.985 2.891 2.799 2.709 2.622 2.536 2.453 2.372 2.294 2.218 2.144 2.072 2.002 1.934 1.869 1.805 1.744 1.684 1.627 1.571 1.517 1.464 1.414 1.365 1.318 1.272 1.228 1.185 1.144 1.104 1.065 1.028 0.992 0.957 0.924 0.891 0.86 0.83 0.801 0.773 0.746 0.719 0.694 0.67 0.646 0.623 0.601 0.58 0.56 0.54 0.521 0.503 0.485 0.468 0.451 0.435 0.42 0.405 0.391 0.377 0.364 0.351 0.338 0.327 0.315 0.304 0.293 0.283 0.273 0.263 0.254 0.245 0.236 0.228 0.22 0.212 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="5.7" PeakHeight="378.622" Num="5" zHalfNm="320.9" Error="0.633">
-163.857 -0.946 0.786 -0.405 0.18
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.38" Depth="0.154"/>
<TopsideChapman PeakHeight="378.622" PeakDensity="403101.75" PeakScaleHeight="43.387" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
