<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 13:50:00.000"
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" >
2026.03.25 (084) 13:50:00</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">
FF202608403251350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.705" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.511" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="3.348" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.341" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="320.303" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.254" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.611" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.158" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.005" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.599" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 270.000 275.000 277.222 279.444 281.667 283.889 286.111 288.333 290.556 292.778 295.000 295.000 297.500 300.000 300.000 300.000 300.000 301.667 303.333 305.000 306.667 308.333 310.000 311.667 313.333 315.000 320.000 320.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 336.667 338.333 340.000 340.000 342.500 345.000 347.500 350.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 492.445 502.274 515.849
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 45 0 0 0 0 0 48 0 0 51 54 0 48 54 54 51 0 45 0 0 0 0 0 0 0 48 48 54 0 51 0 57 57 57 0 0 57 57 0 54 48 54 45 48 0 45 51 57 54 57 48 57 51 57 48 57 51 63 66 63 66 63 63 63 63 60 54 57 51 60 57 51 57 60 63 63 63 63 57 48 60 54 60 57 63 60 63 60 54 57 57 57 54 54 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -2.734375 2.734375 2.734375 -0.390625 1.171875 -0.390625 2.734375 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 -2.734375 -0.390625 0.390625 0.390625 -0.390625 -0.390625 1.953125 -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 -1.171875 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 -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
</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" >
89.49 90.0 95.0 100.0 105.0 110.0 111.722 113.445 115.0 115.167 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 320.303 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.252 2.897 3.239 3.348 3.225 3.225 3.336 3.348 3.513 3.667 3.815 3.959 4.102 4.246 4.391 4.539 4.689 4.841 4.996 5.154 5.315 5.478 5.642 5.809 5.976 6.144 6.313 6.482 6.651 6.82 6.988 7.156 7.324 7.491 7.658 7.825 7.991 8.158 8.324 8.491 8.659 8.826 8.995 9.162 9.329 9.489 9.636 9.751 9.8 9.8 9.795 9.779 9.753 9.717 9.671 9.618 9.555 9.486 9.409 9.326 9.237 9.143 9.043 8.939 8.831 8.72 8.605 8.487 8.367 8.244 8.12 7.994 7.867 7.739 7.61 7.481 7.352 7.222 7.093 6.964 6.835 6.707 6.58 6.454 6.328 6.204 6.081 5.959 5.839 5.72 5.602 5.486 5.372 5.259 5.148 5.038 4.93 4.824 4.72 4.617 4.517 4.417 4.32 4.225 4.131 4.039 3.948 3.86 3.773 3.688 3.604 3.523 3.443 3.364 3.287 3.212 3.138 3.066 2.995 2.926 2.859 2.792 2.728 2.664 2.602 2.542 2.483 2.425 2.368 2.313 2.258 2.206 2.154 2.103 2.054 2.005 1.958 1.912 1.867 1.823 1.78 1.738 1.697 1.657 1.618 1.579 1.542 1.505 1.47 1.435 1.401 1.368 1.335 1.304 1.273 1.242 1.213 1.184 1.156 1.128 1.102 1.075 1.05 1.025 1.0 0.977 0.953 0.931 0.908 0.887 0.866 0.845 0.825 0.805 0.786 0.767 0.749 0.731 0.714 0.697 0.68 0.664 0.648 0.633 0.617 0.603

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.348" PeakHeight="110.0" Num="3" Error="0.0">
-30.471 13.107 -3.146
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.348" EndFrequency="9.8" PeakHeight="320.303" Num="5" zHalfNm="228.254" Error="3.37">
-162.628 -58.813 20.207 -6.111 2.209
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.167" Depth="0.123"/>
<TopsideChapman PeakHeight="320.303" PeakDensity="1191563.2" PeakScaleHeight="64.599" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
