<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 09:00:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.07 (066) 09:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603070900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="7.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.191" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.930" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.650" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.050" 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="34" Val="120.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="342.095" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.998" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="289.497" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.066" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.177" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="85.950" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.428" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.959" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.730" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.500" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 227.500 230.000 232.500 235.000 245.000 242.500 240.000 235.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 231.667 233.333 235.000 235.000 235.000 235.952 236.905 237.857 238.810 239.762 240.714 241.667 242.619 243.571 244.524 245.476 246.429 247.381 248.333 249.286 250.238 251.190 252.143 253.095 254.048 255.000 260.000 260.000 260.000 265.000 265.000 275.000 270.000 270.000 267.500 265.000 265.000 265.000 265.000 265.000 265.000 265.000 275.000 272.500 270.000 270.000 280.000 285.000 290.000 290.000 290.000 295.000 300.000 305.000 300.000 302.500 305.000 305.000 305.000 305.000 311.667 318.333 325.000 325.926 326.951 328.093 329.371 330.814 332.453 334.333 336.511 339.063 342.095 345.757 350.266 355.957 363.365 373.401 387.770 410.047 449.241 536.417
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 0 0 0 0 0 0 66 66 81 81 78 0 0 0 0 81 0 81 0 0 84 81 81 0 0 0 0 0 0 0 0 0 0 0 0 0 60 57 0 0 0 0 0 63 63 0 57 66 54 51 69 72 0 66 69 78 69 66 75 66 69 69 75 0 0 72 63 63 75 60 0 54 60 0 69 66 72 72 0 54 69 66 0 60 63 0 51 60 60 0 69 0 69 72 66 72 63 51 0 0
</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 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 120.000 121.250 122.500 123.750 125.000 130.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 54 0 0 0 69 63 60 60
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="166">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.273 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.0 130.0 135.0 140.0 143.999 145.0 150.0 155.0 160.0 160.999 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 289.497 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.664 0.865 0.966 0.998 0.981 0.929 0.836 0.785 0.785 0.785 0.785 0.785 0.798 0.86 0.923 0.985 0.998 1.132 1.317 1.524 1.755 2.014 2.302 2.621 2.973 3.353 3.756 4.171 4.587 4.991 5.373 5.727 6.049 6.337 6.592 6.813 7.001 7.158 7.285 7.381 7.449 7.489 7.5 7.5 7.49 7.464 7.423 7.368 7.301 7.223 7.135 7.038 6.932 6.82 6.702 6.579 6.452 6.321 6.187 6.051 5.913 5.775 5.636 5.496 5.357 5.219 5.081 4.945 4.811 4.678 4.546 4.417 4.291 4.166 4.044 3.924 3.807 3.693 3.581 3.472 3.365 3.261 3.16 3.061 2.965 2.872 2.781 2.693 2.607 2.524 2.443 2.365 2.288 2.214 2.143 2.073 2.006 1.941 1.877 1.816 1.756 1.699 1.643 1.589 1.537 1.486 1.437 1.39 1.344 1.3 1.257 1.215 1.175 1.136 1.098 1.062 1.027 0.992 0.959 0.928 0.897 0.867 0.838 0.81 0.783 0.757 0.732 0.708 0.684 0.661 0.639 0.618 0.597 0.577 0.558 0.539 0.521 0.504 0.487 0.471 0.455 0.44 0.425 0.411 0.397 0.384 0.371 0.359 0.347 0.335 0.324 0.313 0.303 0.293 0.283 0.273 0.264 0.256 0.247 0.239 0.231 0.223 0.216 0.208 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.998" PeakHeight="110.0" Num="3" Error="0.0">
-26.496 7.987 -1.218
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.998" EndFrequency="7.5" PeakHeight="289.497" Num="5" zHalfNm="229.066" Error="2.122">
-138.541 15.692 -7.524 2.122 -0.247
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.999" Depth="0.213"/>
<TopsideChapman PeakHeight="289.497" PeakDensity="697890.8" PeakScaleHeight="45.959" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
