<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-11 -284 04:40:00.000"
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="18.0">
<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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.10.11 (284) 04:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628410110440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.868" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.358" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="436.738" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="363.279" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="316.099" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.627" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="68.901" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.504" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.288" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.340" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="26">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 382.500 385.000 386.667 388.333 390.000 395.000 397.500 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 411.948 414.243 416.986 420.321 424.466 429.755 436.738 446.382 460.569 483.497
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 81 0 81 84 78 84 84 81 84 78 78 84 84 72 75 69 66 57 51 0
</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 0.390625 0.390625 0.390625 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="150">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.93 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.859 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.789 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.279 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.317 0.294 0.263 0.22 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.226 0.246 0.267 0.288 0.309 0.33 0.351 0.354 0.429 0.525 0.632 0.754 0.895 1.056 1.239 1.445 1.673 1.921 2.188 2.471 2.768 3.076 3.393 3.717 4.045 4.374 4.702 5.024 5.336 5.634 5.911 6.16 6.375 6.547 6.67 6.737 6.75 6.748 6.727 6.682 6.617 6.533 6.433 6.319 6.193 6.057 5.913 5.763 5.608 5.449 5.287 5.124 4.961 4.798 4.636 4.476 4.318 4.163 4.011 3.861 3.716 3.574 3.436 3.302 3.172 3.046 2.924 2.806 2.693 2.583 2.477 2.375 2.277 2.182 2.091 2.004 1.92 1.839 1.761 1.687 1.615 1.547 1.481 1.418 1.358 1.3 1.244 1.191 1.14 1.091 1.044 0.999 0.956 0.915 0.876 0.838 0.802 0.767 0.734 0.703 0.672 0.643 0.615 0.589 0.563 0.539 0.516 0.494 0.472 0.452 0.432 0.414 0.396 0.379 0.362 0.346 0.331 0.317 0.303 0.29 0.278 0.266 0.254 0.243 0.233 0.223 0.213 0.204

</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="6.75" PeakHeight="363.279" Num="5" zHalfNm="316.099" Error="1.19">
-140.216 -4.787 3.432 -1.726 0.807
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.789" Depth="0.154"/>
<TopsideChapman PeakHeight="363.279" PeakDensity="565291.56" PeakScaleHeight="35.288" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
