<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-19 -292 16:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.10.19 (292) 16:50:00</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">
FF202629210191650009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.021" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.901" 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="7.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="7.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.221" 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="4.281" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="258.961" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="171.717" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.726" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.353" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="16.069" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.181" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.030" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="26">
<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 7.2 7.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 404.293 409.516 416.004
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 63 66 63 66 69 69 66 66 60 48 66 69 66 63 69 63 66 69 66 69 63 69 66 57 48
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="186">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.51 90.0 95.0 100.0 105.0 110.0 112.254 114.509 115.0 116.763 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 258.961 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.166 2.788 3.116 3.221 3.099 3.099 3.126 3.221 3.326 3.504 3.695 3.894 4.091 4.28 4.459 4.628 4.786 4.936 5.079 5.215 5.347 5.474 5.597 5.718 5.836 5.953 6.068 6.183 6.298 6.414 6.532 6.652 6.775 6.904 7.039 7.18 7.25 7.25 7.242 7.224 7.196 7.159 7.113 7.059 6.998 6.931 6.857 6.778 6.694 6.606 6.513 6.417 6.318 6.217 6.113 6.007 5.9 5.792 5.683 5.573 5.463 5.353 5.243 5.133 5.024 4.915 4.808 4.701 4.595 4.49 4.387 4.285 4.184 4.085 3.987 3.891 3.797 3.704 3.613 3.523 3.435 3.349 3.265 3.182 3.101 3.022 2.945 2.869 2.795 2.723 2.652 2.583 2.515 2.449 2.385 2.322 2.261 2.201 2.143 2.086 2.03 1.976 1.924 1.872 1.822 1.773 1.726 1.679 1.634 1.59 1.547 1.505 1.465 1.425 1.387 1.349 1.313 1.277 1.242 1.209 1.176 1.144 1.113 1.082 1.053 1.024 0.996 0.969 0.943 0.917 0.892 0.868 0.844 0.821 0.799 0.777 0.756 0.735 0.715 0.695 0.676 0.658 0.64 0.622 0.605 0.589 0.573 0.557 0.542 0.527 0.513 0.498 0.485 0.472 0.459 0.446 0.434 0.422 0.41 0.399 0.388 0.378 0.367 0.357 0.347 0.338 0.329 0.32 0.311 0.302 0.294 0.286 0.278 0.271 0.263 0.256 0.249 0.242 0.235 0.229 0.223 0.217 0.211 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.221" PeakHeight="110.0" Num="3" Error="0.0">
-30.374 12.965 -3.081
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.221" EndFrequency="7.25" PeakHeight="258.961" Num="5" zHalfNm="171.717" Error="1.934">
-112.957 -47.462 25.699 -8.318 0.84
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.763" Depth="0.122"/>
<TopsideChapman PeakHeight="258.961" PeakDensity="652140.2" PeakScaleHeight="56.181" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
