<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.01 (060) 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">
FF202606003011150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.568" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.961" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.960" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="106.747" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.496" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.310" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.953" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.150" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="345.546" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.308" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.172" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.000" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="141.973" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.726" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.022" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="172.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 247.000 249.000 251.000 253.000 255.000 257.000 259.000 261.000 263.000 265.000 270.000 272.500 275.000 277.000 279.000 281.000 283.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 292.500 295.000 300.000 302.222 304.444 306.667 308.889 311.111 313.333 315.556 317.778 320.000 320.000 320.000 321.250 322.500 323.750 325.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 420.000 420.000 430.000 430.000 435.000 440.000 442.500 445.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 475.000 480.000 485.000 490.000 492.500 495.000 500.000 505.000 510.000 515.000 521.559 529.202 538.221 549.023 562.197 578.619 599.661
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 48 0 0 0 0 0 0 0 0 0 60 51 0 51 0 0 0 0 0 0 54 0 60 0 66 0 66 54 0 0 57 0 0 0 0 0 45 54 60 0 0 0 60 63 48 63 72 72 66 69 57 54 63 54 63 60 66 63 0 51 57 0 63 72 66 60 54 57 57 57 54 63 66 45 51 57 54 48 63 66 63 66 63 63 63 63 66 0 57 63 51 66 66 72 69 69 63 54 60 66 60 57 57 0 51 57 57 57 51 51 48 48 57 54 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.8 2.85 2.9 2.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
106.747 107.592 108.552 109.667 111.004
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 51 51 48
</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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="35">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 105.000 107.500 110.000 105.000 105.000 105.000 105.000 105.000 102.500 100.000 101.667 103.333 105.000 105.000 110.000 109.000 108.000 107.000 106.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 109.167 108.333 107.500 106.667 105.833 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 60 60 0 57 51 60 0 0 66 0 60 0 0 66 0 51 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 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 2.734375 -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
</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" >
90.0 95.0 98.496 100.0 101.925 105.0 105.353 108.782 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.546 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.682 2.96 2.937 2.838 2.838 2.838 2.96 2.998 3.149 3.296 3.442 3.59 3.741 3.896 4.056 4.22 4.389 4.563 4.741 4.923 5.109 5.297 5.486 5.677 5.867 6.057 6.246 6.434 6.619 6.803 6.985 7.165 7.343 7.519 7.693 7.866 8.036 8.205 8.373 8.539 8.704 8.867 9.029 9.19 9.348 9.505 9.658 9.808 9.953 10.09 10.216 10.327 10.416 10.476 10.5 10.5 10.497 10.485 10.465 10.438 10.404 10.362 10.314 10.26 10.2 10.135 10.065 9.989 9.91 9.826 9.738 9.647 9.552 9.454 9.354 9.251 9.146 9.039 8.931 8.82 8.709 8.596 8.482 8.367 8.252 8.136 8.02 7.904 7.787 7.671 7.555 7.439 7.323 7.208 7.094 6.98 6.867 6.754 6.643 6.532 6.422 6.314 6.206 6.1 5.994 5.89 5.787 5.685 5.584 5.485 5.387 5.29 5.194 5.1 5.007 4.915 4.825 4.736 4.649 4.562 4.477 4.394 4.311 4.23 4.151 4.072 3.995 3.919 3.845 3.771 3.699 3.629 3.559 3.49 3.423 3.357 3.292 3.229 3.166 3.105 3.044 2.985 2.927 2.87 2.814 2.759 2.705 2.652 2.6 2.549 2.499 2.449 2.401 2.354 2.308 2.262 2.217 2.174 2.131 2.088 2.047 2.007 1.967 1.928 1.89 1.852 1.815 1.779 1.744 1.709 1.675 1.642 1.609 1.577 1.546 1.515 1.485 1.455 1.426 1.398 1.37 1.342 1.316 1.289 1.264 1.238 1.214

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.96" PeakHeight="98.496" Num="3" Error="3.174">
-12.532 5.257 -1.221
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.96" EndFrequency="10.5" PeakHeight="345.546" Num="5" zHalfNm="237.308" Error="3.42">
-206.023 -44.977 20.279 -8.587 2.544
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.286" Depth="0.122"/>
<TopsideChapman PeakHeight="345.546" PeakDensity="1367866.0" PeakScaleHeight="77.022" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
