<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 16:40:00.000"
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="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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.16 (289) 16:40:00</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">
FF202628910161640009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.997" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.428" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="88" Val="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.252" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.296" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="259.318" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="169.539" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.651" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="98.488" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.070" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.987" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 362.500 365.000 367.500 370.000 370.000 375.000 375.000 375.000 377.500 380.000 385.000 390.000 392.500 395.000 397.500 400.000 405.000 405.000 410.000 410.000 415.000 420.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 0 54 0 66 66 66 66 63 0 60 0 63 0 60 0 51 54 60 63 69 69 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.953125 -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" >
89.505 90.0 95.0 100.0 105.0 110.0 112.122 114.245 115.0 116.367 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 259.318 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.187 2.814 3.146 3.252 3.13 3.13 3.173 3.252 3.369 3.541 3.723 3.91 4.098 4.282 4.457 4.623 4.779 4.928 5.069 5.203 5.332 5.456 5.576 5.693 5.807 5.92 6.031 6.141 6.251 6.361 6.472 6.586 6.702 6.822 6.948 7.078 7.15 7.15 7.143 7.127 7.102 7.068 7.026 6.977 6.92 6.858 6.789 6.716 6.637 6.554 6.468 6.378 6.285 6.189 6.091 5.991 5.89 5.787 5.683 5.579 5.474 5.369 5.263 5.158 5.053 4.949 4.845 4.742 4.64 4.539 4.439 4.34 4.242 4.146 4.051 3.957 3.865 3.774 3.685 3.597 3.511 3.426 3.343 3.262 3.182 3.104 3.027 2.952 2.879 2.807 2.737 2.668 2.601 2.535 2.471 2.408 2.347 2.287 2.228 2.171 2.115 2.061 2.008 1.956 1.905 1.856 1.808 1.761 1.715 1.67 1.627 1.584 1.543 1.503 1.463 1.425 1.388 1.351 1.316 1.281 1.248 1.215 1.183 1.152 1.121 1.092 1.063 1.035 1.008 0.981 0.955 0.93 0.905 0.881 0.858 0.835 0.813 0.792 0.771 0.75 0.731 0.711 0.692 0.674 0.656 0.639 0.622 0.605 0.589 0.574 0.558 0.544 0.529 0.515 0.502 0.488 0.475 0.463 0.45 0.438 0.427 0.415 0.404 0.394 0.383 0.373 0.363 0.353 0.344 0.335 0.326 0.317 0.309 0.301 0.293 0.285 0.277 0.27 0.263 0.256 0.249 0.242 0.236 0.23 0.224 0.218

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.252" PeakHeight="110.0" Num="3" Error="0.0">
-30.398 13.0 -3.097
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.252" EndFrequency="7.15" PeakHeight="259.318" Num="5" zHalfNm="169.539" Error="2.02">
-114.154 -46.674 25.489 -8.788 1.176
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.367" Depth="0.122"/>
<TopsideChapman PeakHeight="259.318" PeakDensity="634274.2" PeakScaleHeight="57.987" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
