<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 09:40:00.000"
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="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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: 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" >
2026.10.26 (299) 09:40:00</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">
FF202629910260940009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="7.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.931" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.540" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.910" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="114.619" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="104.774" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="14.619" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.190" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="347.850" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="218.619" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.009" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="190.134" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.121" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="105.976" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="161.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.110" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="78">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 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 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" >
245.000 246.471 247.941 249.412 250.882 252.353 253.824 255.294 256.765 258.235 259.706 261.176 262.647 264.118 265.588 267.059 268.529 270.000 270.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 276.250 277.500 278.750 280.000 280.000 280.000 280.000 283.333 286.667 290.000 291.000 292.000 293.000 294.000 295.000 300.000 300.000 300.000 305.000 305.000 310.000 310.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 340.000 345.000 345.000 350.000 355.000 360.000 365.000 371.990 379.791 388.551 398.461 409.762 422.769 437.900 455.720 477.019 502.924 535.110 576.176 630.388 705.258 815.374
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60
</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 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 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 -1.953125 0.390625 2.734375 -1.171875 -1.171875 -1.953125 -0.390625 1.171875 1.171875 -1.171875 -2.734375 2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.75 1.8 1.85 1.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
114.619 118.125 122.523 128.505
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 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" >
90.0 95.0 100.0 104.774 105.0 110.0 111.953 115.0 119.132 120.0 125.0 126.311 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.85 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.428 1.804 1.91 1.91 1.851 1.798 1.798 1.798 1.812 1.89 1.91 1.988 2.115 2.263 2.426 2.591 2.755 2.915 3.074 3.232 3.392 3.555 3.724 3.901 4.089 4.29 4.507 4.744 5.001 5.273 5.545 5.798 6.021 6.212 6.373 6.509 6.627 6.728 6.816 6.893 6.961 7.021 7.074 7.121 7.162 7.198 7.23 7.257 7.281 7.301 7.317 7.33 7.34 7.346 7.349 7.35 7.35 7.347 7.341 7.332 7.32 7.305 7.288 7.268 7.246 7.221 7.194 7.165 7.134 7.101 7.066 7.029 6.99 6.949 6.907 6.864 6.819 6.773 6.726 6.677 6.627 6.577 6.525 6.473 6.419 6.365 6.31 6.255 6.199 6.143 6.086 6.028 5.97 5.912 5.854 5.795 5.736 5.677 5.618 5.559 5.5 5.441 5.382 5.322 5.263 5.204 5.146 5.087 5.029 4.97 4.912 4.855 4.797 4.74 4.683 4.626 4.57 4.514 4.459 4.404 4.349 4.295 4.241 4.187 4.134 4.082 4.029 3.978 3.926 3.876 3.825 3.775 3.726 3.677 3.629 3.581 3.533 3.486 3.44 3.394 3.348 3.303 3.259 3.215 3.171 3.128 3.085 3.043 3.002 2.961 2.92 2.88 2.84 2.801 2.762 2.724 2.686 2.649 2.612 2.576 2.54 2.504 2.469 2.434 2.4 2.367 2.333 2.3 2.268 2.236 2.204 2.173 2.142 2.112 2.082 2.053 2.023 1.995 1.966 1.938 1.911 1.883 1.856 1.83 1.804 1.778 1.752

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.91" PeakHeight="104.774" Num="3" Error="3.629">
-21.141 7.985 -1.618
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.91" EndFrequency="7.35" PeakHeight="347.85" Num="5" zHalfNm="218.619" Error="4.635">
-264.201 69.67 -40.547 19.275 -5.736
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.537" Depth="0.112"/>
<TopsideChapman PeakHeight="347.85" PeakDensity="670254.3" PeakScaleHeight="105.976" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
