<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 18:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.03.04 (063) 18:00:00</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">
FF202606303041800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.512" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.269" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.350" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.079" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.213" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="360.976" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.395" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.392" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="144.754" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="63.958" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.344" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="176.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 417.500 420.000 425.000 425.000 425.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 435.000 437.500 440.000 445.000 445.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 467.500 470.000 470.000 471.667 473.333 475.000 475.000 480.000 475.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 517.500 520.000 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 561.358 568.689 577.232 587.318 599.404
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 51 54 51 54 51 57 54 0 54 51 0 57 51 51 0 48 54 54 54 51 0 54 54 57 57 54 57 0 57 57 57 60 54 0 54 60 0 0 60 0 57 0 57 54 54 54 0 48 51 51 51 0 51 54 54 51 51 51 54 57 57 57 0 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 -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 -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 -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 -1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 123.333 121.667 120.000 120.000 119.167 118.333 117.500 116.667 115.833 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 118.750 117.500 116.250 115.000 115.000 115.000 115.000 110.000 112.500 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.500 111.000 111.500 112.000 112.500 113.000 113.500 114.000 114.500 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 45 51 0 0 0 0 0 51 60 0 54 48 45 0 0 57 0 0 0 0 0 60 0 0 0 0 0 0 0 66 63 0 0 0 0 0 0 0 0 0 0 66 0 0 0 0 75 75 72 69 0 0 75 78 75 72 0 0 0 75 75 60 0 0 0 0 0 0 0 0 0 81 81 84 84 81 78 81 81 81 63 0 60 66 66 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -2.734375 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -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 0.390625 0.390625 0.390625 0.390625 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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.533 90.0 95.0 100.0 105.0 110.0 112.868 115.0 115.735 118.603 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 360.976 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.07 2.665 2.979 3.079 2.957 2.957 2.957 3.079 3.127 3.303 3.486 3.676 3.876 4.087 4.307 4.537 4.773 5.015 5.26 5.506 5.75 5.991 6.229 6.461 6.69 6.913 7.132 7.346 7.557 7.763 7.966 8.166 8.363 8.558 8.75 8.941 9.129 9.316 9.502 9.687 9.872 10.055 10.238 10.421 10.604 10.786 10.968 11.15 11.332 11.512 11.69 11.864 12.03 12.183 12.313 12.407 12.449 12.45 12.447 12.433 12.411 12.378 12.338 12.288 12.231 12.167 12.095 12.017 11.933 11.843 11.747 11.647 11.542 11.432 11.319 11.202 11.082 10.958 10.833 10.704 10.574 10.442 10.308 10.173 10.036 9.899 9.761 9.622 9.484 9.344 9.205 9.066 8.927 8.789 8.65 8.513 8.376 8.24 8.105 7.971 7.838 7.706 7.575 7.445 7.317 7.19 7.064 6.94 6.817 6.696 6.576 6.458 6.341 6.226 6.112 6.0 5.889 5.78 5.673 5.568 5.463 5.361 5.26 5.161 5.063 4.967 4.873 4.78 4.688 4.598 4.51 4.423 4.338 4.254 4.171 4.09 4.011 3.933 3.856 3.781 3.707 3.634 3.563 3.493 3.424 3.357 3.29 3.225 3.162 3.099 3.038 2.978 2.919 2.861 2.804 2.748 2.693 2.64 2.587 2.535 2.485 2.435 2.387 2.339 2.292 2.246 2.201 2.157 2.114 2.072 2.03 1.989 1.949 1.91 1.872 1.834 1.797 1.761 1.726 1.691 1.657 1.624 1.591 1.559 1.528 1.497

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.079" PeakHeight="110.0" Num="3" Error="0.0">
-30.26 12.798 -3.005
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.079" EndFrequency="12.45" PeakHeight="360.976" Num="5" zHalfNm="251.395" Error="2.843">
-214.225 -48.71 31.376 -13.505 2.691
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.603" Depth="0.122"/>
<TopsideChapman PeakHeight="360.976" PeakDensity="1923108.0" PeakScaleHeight="76.344" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
