<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 16:00:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2 cusps do not match</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" >
2026.10.26 (299) 16:00:00</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">
FF202629910261600009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.044" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.135" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.325" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.330" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="251.467" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="165.729" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.327" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.961" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.468" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.186" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="144.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
365.000 366.500 368.000 369.500 371.000 372.500 374.000 375.500 377.000 378.500 380.000 382.857 385.714 388.571 391.429 394.286 397.143 400.000 400.000 405.000 409.224
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 66 0 0 0 0 0 0 75 0 0 0 0 0 0 60 63 60 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.493 90.0 95.0 100.0 105.0 110.0 111.818 113.636 115.0 115.454 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 251.467 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.237 2.878 3.217 3.325 3.202 3.202 3.294 3.325 3.503 3.696 3.894 4.103 4.322 4.544 4.763 4.971 5.167 5.349 5.518 5.677 5.827 5.97 6.106 6.238 6.365 6.489 6.611 6.732 6.852 6.973 7.094 7.219 7.347 7.478 7.59 7.6 7.597 7.583 7.559 7.525 7.481 7.429 7.369 7.302 7.228 7.148 7.062 6.972 6.877 6.778 6.676 6.571 6.463 6.353 6.242 6.129 6.015 5.9 5.785 5.67 5.554 5.439 5.324 5.21 5.096 4.984 4.872 4.762 4.653 4.545 4.439 4.334 4.231 4.129 4.03 3.931 3.835 3.74 3.647 3.556 3.467 3.379 3.294 3.21 3.128 3.048 2.969 2.892 2.817 2.744 2.672 2.602 2.534 2.467 2.402 2.339 2.277 2.217 2.158 2.1 2.044 1.99 1.936 1.885 1.834 1.785 1.737 1.69 1.645 1.6 1.557 1.515 1.474 1.434 1.395 1.357 1.321 1.285 1.25 1.216 1.183 1.151 1.119 1.089 1.059 1.031 1.002 0.975 0.949 0.923 0.897 0.873 0.849 0.826 0.803 0.781 0.76 0.739 0.719 0.699 0.68 0.662 0.644 0.626 0.609 0.592 0.576 0.56 0.545 0.53 0.515 0.501 0.488 0.474 0.461 0.449 0.436 0.424 0.413 0.401 0.39 0.38 0.369 0.359 0.349 0.34 0.331 0.321 0.313 0.304 0.296 0.288 0.28 0.272 0.265 0.257 0.25 0.243 0.237 0.23 0.224 0.218 0.212 0.206 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.325" PeakHeight="110.0" Num="3" Error="0.0">
-30.454 13.082 -3.135
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.325" EndFrequency="7.6" PeakHeight="251.467" Num="5" zHalfNm="165.729" Error="3.635">
-112.738 -39.179 24.205 -10.786 2.485
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.454" Depth="0.123"/>
<TopsideChapman PeakHeight="251.467" PeakDensity="716625.3" PeakScaleHeight="56.186" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
