<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 19:50:00.000"
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" >
2026.03.29 (088) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608803291950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="13.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.583" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.034" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="10.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="14.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="13.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.307" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="380.324" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.342" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.702" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="125.061" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="69.031" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.985" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.250" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 416.000 417.000 418.000 419.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 426.250 427.500 428.750 430.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 435.000 430.000 430.714 431.429 432.143 432.857 433.571 434.286 435.000 440.000 441.429 442.857 444.286 445.714 447.143 448.571 450.000 445.000 450.000 450.000 450.000 455.000 456.429 457.857 459.286 460.714 462.143 463.571 465.000 465.000 465.000 465.000 465.000 468.500 472.000 475.500 479.000 482.500 486.000 489.500 493.000 496.500 500.000 495.000 510.000 505.000 510.000 515.000 520.000 524.722 530.558 537.954 547.633 560.844 579.951 610.037 664.378
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 57 51 0 51 60 66 63 57 48 0 57 60 57 63 63 66 66 60 63 66 63 63 0 57 57 0 0 0 0 54 0 54 57 57 54 54 54 54 54 54 48 45 48 48 0 0 0 48 45 48 0 54 48 0 45 48 45 48 0 0 0 0 0 0 42 48 0 45 0 0 0 0 51 51 57 0 54 51 0 0 0 42 0 0 48 51 0 0 0 0 0 0 0 0 45 0 0 0 51 42 42 51 54 54 51 48 57 51 48 42 51 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="130">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 123.750 122.500 121.250 120.000 117.500 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 119.833 119.667 119.500 119.333 119.167 119.000 118.833 118.667 118.500 118.333 118.167 118.000 117.833 117.667 117.500 117.333 117.167 117.000 116.833 116.667 116.500 116.333 116.167 116.000 115.833 115.667 115.500 115.333 115.167 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 112.500 115.000 110.000 110.000 110.000 110.000 110.000 110.000 120.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 0 60 0 63 60 0 0 0 66 69 66 69 48 69 60 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 63 0 0 0 0 60 0 0 0 54 69 54 0 57 72 0 0 0 75 0 0 0 0 81 81 75 0 84 0 75 75 78 81 0 78 78 84 78 75 78 78 84 75 81 84 81 81 78 81 75 75 78 75 81 78 72 69 0 75 78 75 78 72 0 72 75 0 0 75 69 72 60 69 0 66 66 0 60 0 0 66 0 0 45 45 57 0 0 0 0 0 0 0 0 0 54 45
</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 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 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -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" >
89.682 90.0 95.0 100.0 105.0 110.0 115.0 116.565 120.0 123.131 125.0 129.696 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.324 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.548 1.998 2.232 2.307 2.234 2.18 2.18 2.18 2.216 2.307 2.316 2.471 2.645 2.837 3.045 3.266 3.495 3.731 3.97 4.21 4.45 4.69 4.93 5.168 5.406 5.644 5.881 6.117 6.354 6.592 6.83 7.068 7.308 7.548 7.79 8.034 8.279 8.526 8.775 9.026 9.28 9.536 9.794 10.055 10.319 10.585 10.853 11.124 11.396 11.67 11.944 12.217 12.488 12.753 13.01 13.252 13.473 13.665 13.815 13.913 13.95 13.95 13.943 13.921 13.884 13.833 13.769 13.694 13.606 13.508 13.4 13.283 13.158 13.025 12.885 12.738 12.586 12.428 12.266 12.1 11.93 11.757 11.581 11.404 11.224 11.043 10.861 10.679 10.495 10.312 10.129 9.946 9.764 9.583 9.403 9.224 9.046 8.87 8.695 8.522 8.351 8.183 8.016 7.851 7.688 7.528 7.37 7.215 7.061 6.911 6.762 6.616 6.473 6.332 6.193 6.057 5.924 5.793 5.664 5.538 5.414 5.293 5.174 5.057 4.943 4.831 4.722 4.614 4.509 4.406 4.305 4.207 4.11 4.015 3.923 3.832 3.744 3.657 3.573 3.49 3.409 3.329 3.252 3.176 3.102 3.03 2.959 2.89 2.822 2.756 2.692 2.629 2.567 2.507 2.448 2.39 2.334 2.279 2.226 2.173 2.122 2.072 2.023 1.976 1.929 1.883 1.839 1.796 1.753 1.712 1.671 1.632 1.593 1.556 1.519 1.483 1.448 1.413 1.38 1.347 1.315 1.284 1.254 1.224 1.195 1.167

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.307" PeakHeight="110.0" Num="3" Error="0.0">
-29.489 11.694 -2.523
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.307" EndFrequency="13.95" PeakHeight="380.324" Num="5" zHalfNm="291.342" Error="3.73">
-220.542 -49.344 26.336 -6.886 -0.192
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.696" Depth="0.127"/>
<TopsideChapman PeakHeight="380.324" PeakDensity="2414423.0" PeakScaleHeight="64.985" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
