<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 17:20:00.000"
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 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 F2x cusp, 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" >
2026.10.17 (290) 17:20:00</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">
FF202629010171720009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.959" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.747" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" 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="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="402.208" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.126" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.236" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="277.364" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="183.567" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.929" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.396" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.708" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.302" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="156.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="30">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 367.500 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.848 381.801 382.879 384.108 385.522 387.168 389.106 391.422 394.240 397.741 402.208 408.105 416.250 428.232 447.594 484.193 579.508
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 60 57 0 63 57 63 63 60 66 63 63 57 51 60 60 63 0 66 72 69 69 69 0 0 0 0 0 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 2.734375 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.953125 1.953125 -1.171875 2.734375
</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" >
89.524 90.0 95.0 100.0 105.0 110.0 112.66 115.0 115.32 117.98 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 277.364 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.102 2.706 3.024 3.126 3.004 3.004 3.004 3.126 3.181 3.332 3.499 3.678 3.859 4.036 4.207 4.371 4.527 4.678 4.823 4.964 5.101 5.235 5.367 5.497 5.625 5.752 5.879 6.005 6.13 6.256 6.381 6.507 6.632 6.757 6.881 7.002 7.116 7.219 7.299 7.344 7.35 7.349 7.34 7.323 7.299 7.268 7.23 7.185 7.135 7.079 7.018 6.953 6.883 6.809 6.732 6.652 6.569 6.483 6.395 6.305 6.213 6.12 6.025 5.93 5.834 5.737 5.64 5.542 5.444 5.347 5.25 5.153 5.056 4.96 4.865 4.77 4.676 4.583 4.491 4.4 4.31 4.221 4.134 4.047 3.962 3.878 3.795 3.714 3.633 3.555 3.477 3.401 3.326 3.252 3.18 3.109 3.04 2.972 2.905 2.839 2.775 2.712 2.65 2.589 2.53 2.472 2.415 2.359 2.305 2.252 2.199 2.148 2.098 2.05 2.002 1.955 1.909 1.865 1.821 1.778 1.736 1.695 1.656 1.617 1.578 1.541 1.505 1.469 1.434 1.4 1.367 1.335 1.303 1.272 1.242 1.213 1.184 1.156 1.128 1.101 1.075 1.049 1.024 1.0 0.976 0.953 0.93 0.908 0.886 0.865 0.844 0.824 0.804 0.785 0.766 0.748 0.73 0.713 0.696 0.679 0.663 0.647 0.631 0.616 0.602 0.587 0.573 0.559 0.546 0.533 0.52 0.508 0.496 0.484 0.472 0.461 0.45 0.439 0.428 0.418 0.408 0.398 0.389 0.379 0.37 0.361

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.126" PeakHeight="110.0" Num="3" Error="0.0">
-30.299 12.854 -3.031
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.126" EndFrequency="7.35" PeakHeight="277.364" Num="5" zHalfNm="183.567" Error="4.827">
-135.992 -35.909 16.891 -3.953 -0.421
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.98" Depth="0.122"/>
<TopsideChapman PeakHeight="277.364" PeakDensity="670254.3" PeakScaleHeight="64.302" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
