<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 22:30:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.03.24 (083) 22:30:00</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">
FF202608303242230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.443" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.334" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="546.553" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="468.195" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="407.045" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.427" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.171" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.008" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.769" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="99.640" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 451.250 447.500 443.750 440.000 440.000 440.000 440.000 435.000 440.000 435.000 435.000 432.500 430.000 427.500 425.000 422.500 420.000 420.000 420.000 422.500 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 436.667 438.333 440.000 442.500 445.000 440.000 442.500 445.000 442.500 440.000 440.000 440.000 440.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 444.722 444.444 444.167 443.889 443.611 443.333 443.056 442.778 442.500 442.222 441.944 441.667 441.389 441.111 440.833 440.556 440.278 440.000 440.000 440.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 440.000 445.000 445.000 447.500 450.000 451.667 453.333 455.000 457.500 460.000 462.500 465.000 465.000 470.000 470.000 470.000 470.000 490.000 480.000 480.000 490.000 480.000 485.000 495.000 495.000 505.000 525.000 515.000 485.000 485.000 490.000 495.000 500.000 510.000 510.000 515.000 520.000 520.000 530.000 535.000 535.000 536.057 537.249 538.604 540.156 541.952 544.056 546.553 549.564 553.268 557.935 563.995 572.182 583.853 601.837 633.150
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 57 60 0 0 57 57 60 0 0 0 0 0 69 54 63 54 0 60 60 66 72 66 0 72 69 0 0 66 0 57 60 0 57 0 63 0 60 0 60 0 57 0 66 63 66 0 63 0 0 0 63 60 57 57 0 54 60 54 0 0 0 60 66 63 63 60 63 0 54 57 60 60 57 57 60 60 66 54 0 57 0 0 0 63 60 66 54 63 63 51 51 60 57 54 60 54 63 51 60 0 48 48 54 0 54 57 54 0 54 51 60 48 54 0 51 0 51 51 0 54 48 0 51 54 0 0 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.953125 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -2.734375 1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -0.390625 -2.734375 -2.734375 -0.390625 -1.953125 -2.734375 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -2.734375 1.953125 -2.734375 -0.390625
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.632 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.265 180.0 185.0 190.0 195.0 200.0 205.0 207.897 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 468.195 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.328 0.305 0.274 0.23 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.246 0.27 0.293 0.317 0.34 0.354 0.372 0.424 0.487 0.561 0.643 0.729 0.818 0.91 1.003 1.098 1.195 1.295 1.397 1.503 1.611 1.723 1.839 1.959 2.084 2.214 2.349 2.49 2.637 2.791 2.953 3.122 3.299 3.485 3.681 3.887 4.104 4.333 4.573 4.827 5.094 5.374 5.667 5.973 6.29 6.617 6.95 7.287 7.621 7.947 8.258 8.549 8.812 9.042 9.233 9.382 9.485 9.54 9.55 9.549 9.531 9.494 9.439 9.367 9.281 9.181 9.069 8.946 8.814 8.673 8.524 8.37 8.21 8.046 7.879 7.709 7.537 7.363 7.189 7.015 6.841 6.668 6.495 6.325 6.156 5.989 5.825 5.663 5.503 5.347 5.193 5.042 4.895 4.75 4.609 4.471 4.337 4.206 4.078 3.953 3.831 3.713 3.598 3.486 3.377 3.271 3.168 3.068 2.971 2.877 2.786 2.697 2.611 2.527 2.446 2.368 2.292 2.218 2.147 2.077 2.01 1.945 1.882 1.821 1.762 1.705 1.65 1.596 1.544 1.494 1.445 1.398 1.352 1.308 1.266 1.224 1.184 1.146 1.108 1.072 1.037 1.003 0.97 0.938 0.908 0.878 0.849 0.821 0.794 0.768 0.743 0.719 0.695 0.672 0.65 0.629 0.608 0.588 0.569 0.55 0.532 0.515 0.498 0.482 0.466 0.451

</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="9.55" PeakHeight="468.195" Num="5" zHalfNm="407.045" Error="6.462">
-232.204 -44.219 16.109 3.736 -3.72
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.897" Depth="0.154"/>
<TopsideChapman PeakHeight="468.195" PeakDensity="1131544.6" PeakScaleHeight="46.769" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
