<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 22:20:00.000"
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="12.0">
<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, F2o cusp not found, 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" >
2026.10.21 (294) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410212220009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.479" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.606" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="460.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="460.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="551.987" 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="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="470.444" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="417.960" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.285" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="81.045" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.983" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.178" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="73">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
470.000 465.000 460.000 475.000 490.000 485.000 492.500 500.000 480.000 475.000 470.000 480.000 480.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 485.000 482.500 480.000 480.714 481.429 482.143 482.857 483.571 484.286 485.000 487.500 490.000 490.000 491.719 493.438 495.156 496.875 498.594 500.313 502.031 503.750 505.469 507.188 508.906 510.625 512.344 514.063 515.781 517.500 519.219 520.938 522.656 524.375 526.094 527.813 529.531 531.250 532.969 534.688 536.406 538.125 539.844 541.563 543.281 545.000 551.987 561.924 577.180 603.589
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 60 0 60 0 63 0 66 0 66 0 63 0 0 57 0 63 63 0 57 57 0 0 0 54 54 0 0 0 0 0 0 0 0 0 54 60 0 0 0 0 0 0 60 0 0 0 0 0 60 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -0.390625 -1.171875 -2.734375 -2.734375 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 0.390625 -0.390625 -1.171875 -2.734375 -2.734375 -1.171875 -2.734375 -1.171875 -1.953125 -2.734375 -1.171875 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875 -1.171875 -2.734375 -2.734375 -1.953125 -1.953125 -1.171875 -2.734375 -1.953125 0.390625 -0.390625 -2.734375 -1.953125 -0.390625 -2.734375 -1.171875 -2.734375 -0.390625 -2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.953125 -0.390625 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.025 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.05 180.0 185.0 190.0 195.0 200.0 205.0 209.075 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 470.444 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0
</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 0.307 0.276 0.234 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.218 0.242 0.265 0.288 0.312 0.335 0.354 0.36 0.397 0.443 0.499 0.564 0.637 0.716 0.798 0.881 0.965 1.05 1.135 1.221 1.307 1.395 1.483 1.573 1.663 1.756 1.849 1.945 2.042 2.141 2.243 2.346 2.452 2.561 2.672 2.786 2.903 3.023 3.147 3.275 3.406 3.542 3.682 3.826 3.976 4.131 4.291 4.458 4.632 4.812 5.0 5.195 5.399 5.61 5.828 6.05 6.27 6.473 6.631 6.7 6.7 6.691 6.663 6.617 6.554 6.477 6.387 6.286 6.175 6.056 5.93 5.798 5.662 5.522 5.379 5.234 5.089 4.943 4.797 4.652 4.508 4.366 4.226 4.088 3.952 3.819 3.689 3.562 3.438 3.318 3.2 3.086 2.975 2.867 2.763 2.662 2.564 2.469 2.377 2.288 2.203 2.12 2.04 1.963 1.888 1.817 1.748 1.681 1.617 1.555 1.495 1.438 1.382 1.329 1.278 1.229 1.181 1.135 1.092 1.049 1.009 0.969 0.932 0.896 0.861 0.827 0.795 0.764 0.735 0.706 0.678 0.652 0.627 0.602 0.579 0.556 0.534 0.514 0.494 0.474 0.456 0.438 0.421 0.404 0.389 0.373 0.359 0.345 0.331 0.318 0.306 0.294 0.283 0.272 0.261 0.251 0.241 0.232 0.222 0.214 0.205

</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="6.7" PeakHeight="470.444" Num="5" zHalfNm="417.96" Error="5.011">
-215.234 -76.852 41.141 -9.057 -1.367
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="99.075" Depth="0.154"/>
<TopsideChapman PeakHeight="470.444" PeakDensity="556947.9" PeakScaleHeight="39.178" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
