<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 17:30:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, 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" >
2026.10.24 (297) 17:30:00</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">
FF202629710241730009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.683" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="465.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="465.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.079" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.213" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="348.222" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.448" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.990" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="160.408" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.573" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="86.804" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.020" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 499.235 503.872 508.970 514.603 520.858 527.847 535.704 544.603 554.766 566.482 580.138 596.258 615.575 639.146
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 42 57 60 63 63 60 60 63 63 63 63 57 57 60 60 60 54 42 45 48 42 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.533 90.0 95.0 100.0 105.0 110.0 112.869 115.0 115.737 118.606 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 348.222 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.07 2.665 2.979 3.079 2.957 2.957 2.957 3.079 3.13 3.305 3.475 3.644 3.817 3.994 4.177 4.367 4.563 4.766 4.975 5.188 5.404 5.622 5.84 6.057 6.272 6.484 6.692 6.896 7.096 7.292 7.484 7.671 7.855 8.034 8.21 8.382 8.55 8.714 8.875 9.032 9.185 9.334 9.478 9.617 9.751 9.878 9.997 10.108 10.209 10.297 10.372 10.431 10.473 10.496 10.5 10.5 10.494 10.482 10.463 10.439 10.409 10.373 10.333 10.287 10.236 10.182 10.122 10.059 9.992 9.922 9.848 9.772 9.692 9.61 9.525 9.437 9.348 9.257 9.164 9.069 8.973 8.876 8.778 8.678 8.578 8.477 8.375 8.273 8.17 8.067 7.964 7.861 7.758 7.654 7.551 7.448 7.346 7.244 7.142 7.041 6.94 6.84 6.74 6.641 6.543 6.445 6.349 6.253 6.158 6.064 5.97 5.878 5.787 5.696 5.607 5.518 5.431 5.344 5.259 5.174 5.091 5.008 4.927 4.847 4.767 4.689 4.612 4.536 4.461 4.387 4.314 4.242 4.171 4.101 4.032 3.964 3.897 3.831 3.766 3.702 3.639 3.577 3.516 3.456 3.397 3.339 3.281 3.225 3.17 3.115 3.061 3.008 2.956 2.905 2.855 2.805 2.756 2.708 2.661 2.615 2.569 2.525 2.48 2.437 2.395 2.353 2.311 2.271 2.231 2.192 2.153 2.116 2.078 2.042 2.006 1.971 1.936 1.902 1.868 1.835 1.803 1.771 1.74 1.709 1.679 1.649

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.079" PeakHeight="110.0" Num="3" Error="0.0">
-30.26 12.798 -3.005
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.079" EndFrequency="10.5" PeakHeight="348.222" Num="5" zHalfNm="228.448" Error="4.174">
-218.851 -18.532 12.159 -6.646 2.254
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.606" Depth="0.122"/>
<TopsideChapman PeakHeight="348.222" PeakDensity="1367866.0" PeakScaleHeight="86.804" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
