<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-27 -058 11:50:00.000"
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="18.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.02.27 (058) 11:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605802271150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.765" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.448" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.950" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.149" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="325.606" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.980" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.104" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.364" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.308" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="63.990" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 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 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 232.500 235.000 235.000 245.000 245.000 247.500 250.000 250.000 255.000 260.000 260.000 261.429 262.857 264.286 265.714 267.143 268.571 270.000 270.000 275.000 275.000 276.250 277.500 278.750 280.000 281.250 282.500 283.750 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 320.000 321.667 323.333 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 437.886 441.113 444.745 448.864 453.573 459.009 465.357 472.865 481.883 492.919 506.735 524.531 548.320
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 60 60 48 57 0 60 57 48 48 57 0 0 54 0 0 0 0 51 60 57 0 0 54 0 0 0 0 60 0 0 0 0 0 57 54 63 0 60 60 63 45 54 60 66 63 57 0 63 66 63 60 66 57 0 0 51 60 63 51 57 69 69 60 66 72 60 60 60 51 60 54 63 66 69 66 54 66 72 66 72 69 69 54 57 60 54 63 54 60 66 60 66 63 63 69 69 66 54 60 63 66 60 66 63 63 57 60 60 60 51 60 60 57 57 54 60 63 57 0 45 51 45 0 0 42
</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 1.953125 1.171875 -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 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 -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 2.734375 0.390625 -0.390625 -0.390625 1.953125 -2.734375 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" >
89.554 90.0 95.0 100.0 105.0 110.0 113.441 115.0 116.882 120.0 120.323 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 325.606 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.983 2.553 2.854 2.95 2.828 2.828 2.828 2.939 2.95 3.105 3.267 3.429 3.592 3.757 3.926 4.099 4.277 4.459 4.646 4.838 5.035 5.236 5.441 5.65 5.862 6.077 6.294 6.512 6.733 6.954 7.176 7.398 7.621 7.843 8.064 8.285 8.505 8.724 8.941 9.155 9.365 9.571 9.771 9.961 10.14 10.301 10.44 10.549 10.621 10.65 10.65 10.645 10.628 10.6 10.561 10.511 10.452 10.384 10.308 10.223 10.132 10.034 9.93 9.821 9.707 9.588 9.465 9.338 9.209 9.077 8.942 8.806 8.667 8.528 8.387 8.246 8.104 7.962 7.82 7.678 7.537 7.396 7.255 7.116 6.978 6.84 6.704 6.57 6.437 6.305 6.175 6.046 5.92 5.795 5.672 5.55 5.431 5.313 5.198 5.084 4.972 4.862 4.755 4.649 4.545 4.443 4.343 4.244 4.148 4.054 3.961 3.871 3.782 3.695 3.61 3.527 3.445 3.365 3.287 3.21 3.136 3.062 2.991 2.921 2.852 2.785 2.72 2.656 2.593 2.532 2.472 2.413 2.356 2.3 2.246 2.193 2.14 2.09 2.04 1.991 1.944 1.898 1.852 1.808 1.765 1.723 1.682 1.641 1.602 1.564 1.526 1.49 1.454 1.419 1.385 1.352 1.32 1.288 1.257 1.227 1.197 1.169 1.141 1.113 1.086 1.06 1.035 1.01 0.986 0.962 0.939 0.916 0.894 0.873 0.852 0.831 0.811 0.792 0.773 0.754 0.736 0.718 0.701 0.684 0.668 0.651

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.95" PeakHeight="110.0" Num="3" Error="0.0">
-30.153 12.64 -2.933
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.95" EndFrequency="10.65" PeakHeight="325.606" Num="5" zHalfNm="237.98" Error="2.506">
-175.934 -38.561 11.477 -3.464 1.199
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.323" Depth="0.122"/>
<TopsideChapman PeakHeight="325.606" PeakDensity="1407227.0" PeakScaleHeight="63.99" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
