<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-04 -094 04:10:00.000"
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" >
2026.04.04 (094) 04:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609404040410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.137" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.784" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="310.794" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.620" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.756" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.139" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.163" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.417" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.060" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 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 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 215.000 215.000 215.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 221.667 223.333 225.000 226.667 228.333 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 232.500 235.000 235.000 236.667 238.333 240.000 235.000 236.000 237.000 238.000 239.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 240.000 243.333 246.667 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 255.000 260.000 257.500 255.000 260.000 261.667 263.333 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 277.500 280.000 280.000 280.000 282.500 285.000 285.000 285.000 287.500 290.000 290.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 310.000 315.000 315.000 320.000 320.000 320.000 330.000 335.000 335.000 340.000 345.000 350.000 355.000 360.000 370.000 380.000 390.000 400.000 415.000 436.580 466.485 510.679 582.621
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 75 0 69 75 0 75 0 0 81 0 0 0 0 81 75 0 0 0 0 0 75 75 78 0 0 0 81 84 0 75 78 0 0 63 75 0 69 0 0 72 0 66 0 72 0 75 0 57 0 66 0 69 69 0 63 63 0 69 57 60 60 63 48 0 57 60 66 69 54 63 69 69 69 69 72 0 60 60 66 0 63 69 69 0 69 72 69 72 66 72 72 69 69 69 60 69 66 69 69 69 63 69 69 72 75 72 72 0 75 75 75 69 66 63 57 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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.5 135.0 140.0 145.0 150.0 155.0 159.0 160.0 165.0 170.0 175.0 180.0 183.5 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 310.794 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.333 0.306 0.262 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.238 0.269 0.301 0.332 0.354 0.371 0.444 0.552 0.733 1.088 1.844 2.831 3.646 4.297 4.836 5.294 5.69 6.037 6.342 6.61 6.847 7.056 7.237 7.395 7.529 7.641 7.733 7.804 7.855 7.887 7.9 7.9 7.895 7.879 7.85 7.811 7.762 7.703 7.636 7.561 7.479 7.39 7.296 7.196 7.092 6.984 6.872 6.758 6.641 6.521 6.401 6.279 6.156 6.032 5.908 5.784 5.661 5.537 5.415 5.293 5.172 5.053 4.934 4.818 4.702 4.589 4.476 4.366 4.258 4.151 4.047 3.944 3.843 3.744 3.647 3.553 3.46 3.369 3.28 3.194 3.109 3.026 2.945 2.866 2.789 2.713 2.64 2.568 2.498 2.43 2.364 2.299 2.236 2.175 2.115 2.056 2.0 1.944 1.891 1.838 1.787 1.737 1.689 1.642 1.596 1.552 1.508 1.466 1.425 1.385 1.347 1.309 1.272 1.237 1.202 1.168 1.135 1.103 1.072 1.042 1.013 0.984 0.957 0.93 0.904 0.878 0.853 0.829 0.806 0.783 0.761 0.74 0.719 0.699 0.679 0.66 0.641 0.623 0.605 0.588 0.572 0.555 0.54 0.525 0.51 0.495 0.481 0.468 0.454 0.442 0.429 0.417 0.405 0.394 0.383 0.372 0.361 0.351 0.341 0.331 0.322 0.313 0.304 0.296 0.287 0.279 0.271 0.263 0.256 0.249

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.9" PeakHeight="310.794" Num="5" zHalfNm="238.62" Error="2.573">
-166.367 60.176 -23.208 2.77 -0.665
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="73.5" Depth="0.154"/>
<TopsideChapman PeakHeight="310.794" PeakDensity="774317.6" PeakScaleHeight="54.417" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
