<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 18:40:00.000"
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="12.0">
<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: 50% PACIFIC flags: F2o cusp not found, 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" >
2026.10.20 (293) 18:40:00</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">
FF202629310201840009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.427" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.668" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="508.923" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="508.923" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="508.923" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.726" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="396.115" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.891" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.316" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="195.971" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.217" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="106.855" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="205.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="18">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
508.923 513.876 520.000 525.000 530.000 540.000 545.000 555.000 565.000 580.000 590.000 610.000 625.000 650.000 675.000 710.000 750.000 804.873
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 -0.390625 1.171875 1.171875 1.953125 1.171875 0.390625 2.734375 1.171875 -1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 -1.953125 1.953125 -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" >
89.594 90.0 95.0 100.0 105.0 110.0 114.483 115.0 118.965 120.0 123.448 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 396.115 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.831 2.36 2.638 2.726 2.603 2.603 2.603 2.631 2.726 2.766 2.897 3.031 3.168 3.308 3.452 3.599 3.748 3.901 4.057 4.215 4.376 4.54 4.705 4.872 5.041 5.212 5.384 5.556 5.729 5.903 6.076 6.249 6.421 6.593 6.763 6.932 7.098 7.262 7.424 7.583 7.738 7.89 8.038 8.182 8.322 8.456 8.585 8.709 8.827 8.939 9.045 9.144 9.237 9.322 9.4 9.471 9.534 9.589 9.636 9.676 9.707 9.729 9.744 9.75 9.75 9.749 9.744 9.734 9.721 9.705 9.684 9.661 9.634 9.603 9.57 9.534 9.495 9.453 9.409 9.362 9.313 9.261 9.208 9.152 9.095 9.035 8.974 8.912 8.848 8.782 8.715 8.647 8.578 8.508 8.436 8.364 8.291 8.217 8.143 8.068 7.992 7.916 7.84 7.763 7.686 7.609 7.531 7.453 7.375 7.298 7.22 7.142 7.064 6.986 6.909 6.831 6.754 6.677 6.601 6.524 6.448 6.373 6.297 6.222 6.148 6.074 6.0 5.927 5.855 5.783 5.711 5.64 5.569 5.5 5.43 5.361 5.293 5.226 5.159 5.092 5.026 4.961 4.897 4.833 4.769 4.707 4.645 4.583 4.523 4.462 4.403 4.344 4.286 4.228 4.172 4.115 4.06 4.005 3.95 3.897 3.843 3.791 3.739 3.688 3.637 3.587 3.538 3.489 3.441 3.393 3.346 3.3 3.254 3.209 3.164 3.12 3.076 3.033 2.991 2.949 2.908 2.867 2.827 2.787 2.748 2.709

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.726" PeakHeight="110.0" Num="3" Error="0.0">
-29.947 12.342 -2.801
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.726" EndFrequency="9.75" PeakHeight="396.115" Num="5" zHalfNm="253.891" Error="0.996">
-272.589 -0.139 0.104 -0.121 0.078
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.448" Depth="0.123"/>
<TopsideChapman PeakHeight="396.115" PeakDensity="1179435.5" PeakScaleHeight="106.855" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
